Fail to connect to peers when trying to sync node

[mehdi-d-b]

Hello,
I'm trying to setup my first node and I'm having a new issue: every peer I try fails to connect, as seen in these logs:

2025-11-28T11:25:02.414985076Z INFO ThreadId(01) neptune_cash: Starting neptune-core node on main.
2025-11-28T11:25:02.415628165Z INFO ThreadId(01) neptune_cash: Data directory is xxx
2025-11-28T11:25:02.441933291Z INFO ThreadId(01) neptune_cash::state::wallet::wallet_file: ***** Reading wallet from xxx *****
2025-11-28T11:25:02.442196859Z INFO ThreadId(01) neptune_cash::state::wallet::wallet_state: wallet DB directory path is xxx. Exists: yes
2025-11-28T11:25:02.453576585Z INFO ThreadId(01) neptune_cash::state::wallet::rusty_wallet_database: Wallet DB schema version 1 is correct. proceeding
2025-11-28T11:25:02.585042217Z INFO ThreadId(01) neptune_cash: Checking if we need to restore UTXOs
2025-11-28T11:25:02.585616849Z INFO ThreadId(01) neptune_cash::state: Checking 0 incoming UTXOs
2025-11-28T11:25:02.585672596Z INFO ThreadId(01) neptune_cash::state: No missing monitored UTXOs found in wallet database. Wallet database looks good.
2025-11-28T11:25:02.585682853Z INFO ThreadId(01) neptune_cash: UTXO restoration check complete
2025-11-28T11:25:02.58586711Z INFO ThreadId(01) neptune_cash: Now listening for incoming peer-connections
2025-11-28T11:25:02.58590677Z INFO ThreadId(01) neptune_cash: Most known canonical block has height 3630
2025-11-28T11:25:02.590965458Z INFO ThreadId(01) neptune_cash: Started RPC server
2025-11-28T11:25:02.591042424Z INFO ThreadId(01) neptune_cash::application::loops::main_loop: Starting main loop
2025-11-28T11:25:02.656968374Z WARN ThreadId(02) neptune_cash::application::loops::connect_to_peers: Didn't get handshake response from 51.15.139.238:9798. Failed to establish connection.
2025-11-28T11:25:02.657078118Z INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Connection to 51.15.139.238:9798 closing
2025-11-28T11:25:02.666546077Z WARN ThreadId(02) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: Connection refused (os error 111)
2025-11-28T11:25:02.666593835Z INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T11:25:02.691743251Z WARN ThreadId(02) neptune_cash::application::loops::connect_to_peers: Didn't get handshake response from 139.162.193.206:9798. Failed to establish connection.
2025-11-28T11:25:02.691800929Z INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Connection to 139.162.193.206:9798 closing
2025-11-28T11:25:02.84762696Z INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 62.113.194.94:9798
2025-11-28T11:25:02.886704467Z INFO ThreadId(17) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 194.190.216.153:39798
2025-11-28T11:25:02.931450136Z INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T11:25:03.039069857Z INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T11:25:03.116641673Z INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Peer 194.190.216.153:39798 closed connection.
2025-11-28T11:25:03.12266831Z INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:39798 closing
2025-11-28T11:25:03.182398469Z INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 66.23.193.243:9798
2025-11-28T11:25:04.142217858Z INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T13:47:57.006097446Z WARN ThreadId(17) neptune_cash::application::loops::peer_loop: Error when receiving from peer: 62.113.194.94:9798. Error: Connection reset by peer (os error 104)
2025-11-28T13:47:57.006186166Z WARN ThreadId(17) neptune_cash::application::loops::peer_loop: Punishing peer 62.113.194.94 for InvalidMessage
2025-11-28T13:47:57.006218456Z INFO ThreadId(17) neptune_cash::application::loops::peer_loop: Peer 62.113.194.94:9798 closed connection.
2025-11-28T13:47:57.01905374Z INFO ThreadId(17) neptune_cash::application::loops::connect_to_peers: Connection to 62.113.194.94:9798 closing
2025-11-28T13:47:57.030010471Z WARN ThreadId(14) neptune_cash::application::loops::connect_to_peers: Didn't get handshake response from 51.15.139.238:9798. Failed to establish connection.
2025-11-28T13:47:57.030061691Z INFO ThreadId(14) neptune_cash::application::loops::connect_to_peers: Connection to 51.15.139.238:9798 closing
2025-11-28T13:47:57.035027577Z WARN ThreadId(14) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: Connection refused (os error 111)
2025-11-28T13:47:57.035077136Z INFO ThreadId(14) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T13:47:57.065989921Z WARN ThreadId(14) neptune_cash::application::loops::connect_to_peers: Didn't get handshake response from 139.162.193.206:9798. Failed to establish connection.
2025-11-28T13:47:57.066038655Z INFO ThreadId(14) neptune_cash::application::loops::connect_to_peers: Connection to 139.162.193.206:9798 closing
2025-11-28T13:47:57.141012079Z WARN ThreadId(14) neptune_cash::application::loops::connect_to_peers: Didn't get handshake response from 194.190.216.153:39798. Failed to establish connection.
2025-11-28T13:47:57.141095253Z INFO ThreadId(14) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:39798 closing
2025-11-28T13:47:57.148013239Z WARN ThreadId(14) neptune_cash::application::loops::peer_loop: Error when receiving from peer: 66.23.193.243:9798. Error: Connection reset by peer (os error 104)
2025-11-28T13:47:57.148075009Z WARN ThreadId(14) neptune_cash::application::loops::peer_loop: Punishing peer 66.23.193.243 for InvalidMessage
2025-11-28T13:47:57.148089455Z INFO ThreadId(14) neptune_cash::application::loops::peer_loop: Peer 66.23.193.243:9798 closed connection.
2025-11-28T13:47:57.156920348Z INFO ThreadId(14) neptune_cash::application::loops::connect_to_peers: Connection to 66.23.193.243:9798 closing
2025-11-28T13:47:57.158254609Z INFO ThreadId(17) neptune_cash::application::loops::connect_to_peers: Connection to 3.249.158.218:9798 closing

Last week I was able to connect to peers, even though I had trouble downloading blocks.

I tried multiple peer addresses I was able to find online, as shown here:
neptune-core --peer 139.162.193.206:9798 --peer 51.15.139.238:9798 --peer 66.23.193.243:9798 --peer 194.190.216.153:49798 --peer 194.190.216.153:39798 --peer 62.113.194.94:9798

I also tried just neptune-core , without --peer, but I get stucked at:

2025-11-28T13:52:41.384243575Z INFO ThreadId(01) neptune_cash::application::loops::main_loop: Starting main loop

I tried to apply the patch-0.5.0.txt from dan-da and without (related to the previous issue #759 I had).

I tried to reset the banned peers, with:
rm -rf ~/.local/share/neptune/main/databases/banned_ips/

Thanks in advance.

[codewordneptune]

Somewhat similar challenges here also. Using neptune-cash 0.5.0 on Windows.

C:\NeptuneCash\Core>neptune-core --peer 139.162.193.206:9798 --peer 51.15.139.238:9798 --peer 66.23.193.243:9798 --peer 194.190.216.153:49798 --peer 194.190.216.153:39798 --peer 62.113.194.94:9798
2025-11-28T19:32:35.8824958Z  INFO ThreadId(01) neptune_cash: Starting neptune-core node on main.
2025-11-28T19:32:35.8858143Z  INFO ThreadId(01) neptune_cash: Data directory is C:\Users\XXX\AppData\Roaming\neptune\neptune\data\main
2025-11-28T19:32:35.9084824Z  INFO ThreadId(01) neptune_cash::state::wallet::wallet_file: ***** Reading wallet from C:\Users\XXX\AppData\Roaming\neptune\neptune\data\main\wallet\wallet.dat *****



2025-11-28T19:32:35.9094888Z  INFO ThreadId(01) neptune_cash::state::wallet::wallet_state: wallet DB directory path is C:\Users\XXX\AppData\Roaming\neptune\neptune\data\main\databases\wallet. Exists: yes
2025-11-28T19:32:35.9156272Z  INFO ThreadId(01) neptune_cash::state::wallet::rusty_wallet_database: Wallet DB schema version 1 is correct.  proceeding
2025-11-28T19:32:36.2970697Z  INFO ThreadId(01) neptune_cash: Checking if we need to restore UTXOs
2025-11-28T19:32:36.2975599Z  INFO ThreadId(01) neptune_cash::state: Checking 0 incoming UTXOs
2025-11-28T19:32:36.2976705Z  INFO ThreadId(01) neptune_cash::state: No missing monitored UTXOs found in wallet database. Wallet database looks good.
2025-11-28T19:32:36.2977853Z  INFO ThreadId(01) neptune_cash: UTXO restoration check complete
2025-11-28T19:32:36.333702Z  INFO ThreadId(01) neptune_cash: Now listening for incoming peer-connections
2025-11-28T19:32:36.3340433Z  INFO ThreadId(01) neptune_cash: Most known canonical block has height 0
2025-11-28T19:32:36.3429999Z  INFO ThreadId(01) neptune_cash: Started RPC server
2025-11-28T19:32:36.3431734Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Starting main loop
2025-11-28T19:32:36.430899Z  INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 62.113.194.94:9798
2025-11-28T19:32:36.4443395Z  INFO ThreadId(16) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 139.162.193.206:9798
2025-11-28T19:32:36.4445615Z  INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 194.190.216.153:39798
2025-11-28T19:32:36.4507791Z  INFO ThreadId(13) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 51.15.139.238:9798
2025-11-28T19:32:36.4931956Z  INFO ThreadId(16) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T19:32:36.5159859Z  INFO ThreadId(16) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T19:32:36.5311346Z  INFO ThreadId(16) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T19:32:36.86814Z  INFO ThreadId(13) neptune_cash::application::loops::connect_to_peers: Established outgoing connection to 66.23.193.243:9798
2025-11-28T19:32:37.2271065Z  INFO ThreadId(13) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T19:32:37.4741796Z  INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Peer indicates block which satisfies sync mode criterion, issuing challenge.
2025-11-28T19:32:40.0119929Z  WARN ThreadId(02) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:32:40.0121784Z  INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:32:48.5423355Z  INFO ThreadId(13) neptune_cash::application::loops::peer_loop: Got sync challenge response from 62.113.194.94
2025-11-28T19:32:50.3921419Z  INFO ThreadId(14) neptune_cash::application::loops::peer_loop: Successful sync challenge response; relaying peer tip info to main loop.
2025-11-28T19:32:50.3923404Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Entering synchronization mode due to peer 62.113.194.94:9798 indicating tip height 17154; cumulative pow: ProofOfWork([802617949, 98117467, 0, 0, 0, 0])
2025-11-28T19:32:51.3514885Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:32:51.3517444Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from 7962e48729acd97e08efa77b5b28d49f2dc0e5609a4f1f1affca5b4549c78e520462a7f955371386
 height 0
2025-11-28T19:32:54.7027573Z  INFO ThreadId(10) neptune_cash::application::loops::peer_loop: Got sync challenge response from 139.162.193.206
2025-11-28T19:32:55.872213Z  INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Successful sync challenge response; relaying peer tip info to main loop.
2025-11-28T19:32:57.0609964Z  INFO ThreadId(14) neptune_cash::application::loops::peer_loop: Got sync challenge response from 51.15.139.238
2025-11-28T19:32:58.2107781Z  INFO ThreadId(02) neptune_cash::application::loops::peer_loop: Successful sync challenge response; relaying peer tip info to main loop.
2025-11-28T19:33:04.9299486Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 9877d5625af90ad3a838f9984508d72a62a88d4b78ed85b0734abe11ebab6ecfb60e923501000000; height: 35
2025-11-28T19:33:06.3563518Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:33:06.356754Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from 9877d5625af90ad3a838f9984508d72a62a88d4b78ed85b0734abe11ebab6ecfb60e923501000000
 height 35
2025-11-28T19:33:06.4309063Z  INFO ThreadId(14) neptune_cash::application::loops::peer_loop: Got sync challenge response from 66.23.193.243
2025-11-28T19:33:07.6603166Z  INFO ThreadId(14) neptune_cash::application::loops::peer_loop: Successful sync challenge response; relaying peer tip info to main loop.
2025-11-28T19:33:21.4018301Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 25461867ed2fa6f30e7b2325ab39e7940063d291182f78dfccfd7ef48b017fea95eddfa802000000; height: 70
2025-11-28T19:33:24.3960218Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:33:24.3967353Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from 25461867ed2fa6f30e7b2325ab39e7940063d291182f78dfccfd7ef48b017fea95eddfa802000000
 height 70
2025-11-28T19:33:44.8287964Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 833e2b0e50725b77d159691aa68db36b1b35991b539467b8c0ce1d7e0181443faeeb8e9e03000000; height: 105
2025-11-28T19:33:46.0235757Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:33:46.0241546Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 66.23.193.243:9798
requesting blocks descending from 833e2b0e50725b77d159691aa68db36b1b35991b539467b8c0ce1d7e0181443faeeb8e9e03000000
 height 105
2025-11-28T19:34:15.3608421Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: a85e63c972bec12d19f27c9f9c46ff01e145154fcabf65fa6bb7e1c4e5dd5cc91d81939901000000; height: 140
2025-11-28T19:34:16.5806295Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:34:16.581348Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from a85e63c972bec12d19f27c9f9c46ff01e145154fcabf65fa6bb7e1c4e5dd5cc91d81939901000000
 height 140
2025-11-28T19:34:30.4622492Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: a9f34ad219fb1d977c1f01d8f5840c88d0200b35e328de1df0b03de060816a8175a2fc2800000000; height: 175
2025-11-28T19:34:31.6775758Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:34:31.6783174Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 139.162.193.206:9798
requesting blocks descending from a9f34ad219fb1d977c1f01d8f5840c88d0200b35e328de1df0b03de060816a8175a2fc2800000000
 height 175
2025-11-28T19:34:36.3483547Z  INFO ThreadId(16) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:34:36.3892109Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 867a5ed7eecf124f3a5dcb138a3565563837f2452486d02babe0b3ace8342555f9137ea300000000; height: 185
2025-11-28T19:34:37.6854424Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:34:37.686884Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 66.23.193.243:9798
requesting blocks descending from 867a5ed7eecf124f3a5dcb138a3565563837f2452486d02babe0b3ace8342555f9137ea300000000
 height 185
2025-11-28T19:34:38.5631885Z  WARN ThreadId(11) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:34:38.5633942Z  INFO ThreadId(11) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:34:58.8779707Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 57dd7e214bac592cffa81277a4057e433a9907a06853906c4314a2d53167bf8019eb33cc00000000; height: 220
2025-11-28T19:35:01.732341Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:35:01.7332744Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from 57dd7e214bac592cffa81277a4057e433a9907a06853906c4314a2d53167bf8019eb33cc00000000
 height 220
2025-11-28T19:35:13.6812014Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 1898854b65807eb1109318e20d905cd102dae612670987d34f806ce6e144fbea548ecef700000000; height: 255
2025-11-28T19:35:14.914239Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:35:14.9152705Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 139.162.193.206:9798
requesting blocks descending from 1898854b65807eb1109318e20d905cd102dae612670987d34f806ce6e144fbea548ecef700000000
 height 255
2025-11-28T19:35:18.2838772Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: eb6d8f1fd05e9ba5ded3ec1d46ec9ea497ef318e0148d0a8377e53725332c37f0e23916401000000; height: 265
2025-11-28T19:35:20.9353237Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:35:20.9371758Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 139.162.193.206:9798
requesting blocks descending from eb6d8f1fd05e9ba5ded3ec1d46ec9ea497ef318e0148d0a8377e53725332c37f0e23916401000000
 height 265
2025-11-28T19:35:24.6487732Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: cad52c6ef67205dc202433c7bfc5c83f7e839a0368ca9ab6f88d629f565a02d95466bb5500000000; height: 275
2025-11-28T19:35:26.9424354Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:35:26.9440028Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from cad52c6ef67205dc202433c7bfc5c83f7e839a0368ca9ab6f88d629f565a02d95466bb5500000000
 height 275
2025-11-28T19:35:37.5624039Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: a9859653e2af3889a5163897c727ea80baaa6cb29c575af842be117cdb00a0400ef3a72401000000; height: 310
2025-11-28T19:35:38.9656291Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:35:38.9672506Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from a9859653e2af3889a5163897c727ea80baaa6cb29c575af842be117cdb00a0400ef3a72401000000
 height 310
2025-11-28T19:35:49.530978Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: f6774812139d3749ef095f57d532c64a41893767c6c412c9c5ded309065f7b617ddecf2101000000; height: 345
2025-11-28T19:35:50.974672Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:35:50.9764843Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from f6774812139d3749ef095f57d532c64a41893767c6c412c9c5ded309065f7b617ddecf2101000000
 height 345
2025-11-28T19:36:02.6376971Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 2eabd66f35d32243325666e2ca758404b682e4593f5732eb488d5877e295b13775ecd0c200000000; height: 380
2025-11-28T19:36:04.069839Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:36:04.0711495Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from 2eabd66f35d32243325666e2ca758404b682e4593f5732eb488d5877e295b13775ecd0c200000000
 height 380
2025-11-28T19:36:21.7288772Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 8979db21fed667ddfd829b86deb4d02dbc5e74fca6dfcda48cf3afcfc34b15f57aa6e01b00000000; height: 415
2025-11-28T19:36:22.9213048Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:36:22.9223361Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 66.23.193.243:9798
requesting blocks descending from 8979db21fed667ddfd829b86deb4d02dbc5e74fca6dfcda48cf3afcfc34b15f57aa6e01b00000000
 height 415
2025-11-28T19:36:36.3511083Z  INFO ThreadId(16) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:36:38.6048106Z  WARN ThreadId(15) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:36:38.6049925Z  INFO ThreadId(15) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:36:56.0993663Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 0e5b535c73763d852cada3deb9bc237434de21354c29bb94e1dd11166e15d269c680940801000000; height: 450
2025-11-28T19:36:58.9570227Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:36:58.9585258Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from 0e5b535c73763d852cada3deb9bc237434de21354c29bb94e1dd11166e15d269c680940801000000
 height 450
2025-11-28T19:37:12.7160133Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 98929cbc244d75eeed9a5f55b446e3f68097ae2cd6cf35acd43e9619dc3c68d9e93bcee500000000; height: 485
2025-11-28T19:37:13.9656747Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:37:13.9671448Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from 98929cbc244d75eeed9a5f55b446e3f68097ae2cd6cf35acd43e9619dc3c68d9e93bcee500000000
 height 485
2025-11-28T19:37:35.6375773Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 2cfb7742201175a28c4221b6e0471d03d4815f02aff39b5671167ce0995b7fcb8b116d7300000000; height: 520
2025-11-28T19:37:37.9846676Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:37:37.9865994Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 66.23.193.243:9798
requesting blocks descending from 2cfb7742201175a28c4221b6e0471d03d4815f02aff39b5671167ce0995b7fcb8b116d7300000000
 height 520
2025-11-28T19:38:13.3949315Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: c23c4a89fa243cbff2a5ea37c0491948232ec962fd6055a6e21c533efde34689c76edbee00000000; height: 555
2025-11-28T19:38:14.6213506Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:38:14.6223902Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from c23c4a89fa243cbff2a5ea37c0491948232ec962fd6055a6e21c533efde34689c76edbee00000000
 height 555
2025-11-28T19:38:23.7911984Z  INFO ThreadId(15) neptune_cash::application::loops::peer_loop: Got sync challenge response from 194.190.216.153
2025-11-28T19:38:25.1982745Z  WARN ThreadId(14) neptune_cash::application::loops::peer_loop: Punishing peer 194.190.216.153 for TimedOutSyncChallengeResponse
2025-11-28T19:38:28.7086389Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 06a74d8f11d4aa5a02edbcbfd0f74c22e25a93bd083609224a0a1383c7d00eddbb5712c400000000; height: 590
2025-11-28T19:38:29.9550179Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:38:29.9562267Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 66.23.193.243:9798
requesting blocks descending from 06a74d8f11d4aa5a02edbcbfd0f74c22e25a93bd083609224a0a1383c7d00eddbb5712c400000000
 height 590
2025-11-28T19:38:36.353907Z  INFO ThreadId(16) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:38:40.0462945Z  WARN ThreadId(16) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:38:40.0465699Z  INFO ThreadId(16) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:38:48.6055976Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 3542ed386faeadf382a3f5e2b13a91087b9639c5c31fbaf2bd6128d4f6e9dab9ea618de400000000; height: 625
2025-11-28T19:38:51.0078799Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:38:51.0097469Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from 3542ed386faeadf382a3f5e2b13a91087b9639c5c31fbaf2bd6128d4f6e9dab9ea618de400000000
 height 625
2025-11-28T19:39:03.937234Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: ee3f6c7ea2c2854aecb09031a8ff0853facc7d5f0c970850ae7db59de774d4bca2fdb60901000000; height: 660
2025-11-28T19:39:06.0281205Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:39:06.0299847Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from ee3f6c7ea2c2854aecb09031a8ff0853facc7d5f0c970850ae7db59de774d4bca2fdb60901000000
 height 660
2025-11-28T19:39:20.9321574Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 5c95a9ce562961791804c4437677cf24d36813dc94c2ca0bb205ebd9d6a45b85bfc3540500000000; height: 695
2025-11-28T19:39:22.1453221Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:39:22.146461Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 139.162.193.206:9798
requesting blocks descending from 5c95a9ce562961791804c4437677cf24d36813dc94c2ca0bb205ebd9d6a45b85bfc3540500000000
 height 695
2025-11-28T19:39:25.455047Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: ebee3208d7457e1e19a4cfd230c989343faa62938c5d6891f2a7f04cb926f39331aaea0000000000; height: 705
2025-11-28T19:39:28.1700807Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:39:28.1722024Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from ebee3208d7457e1e19a4cfd230c989343faa62938c5d6891f2a7f04cb926f39331aaea0000000000
 height 705
2025-11-28T19:39:53.8026177Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: 5e3c0200c92bfc9c453f1b7a9d2dacf13aa3636924668085d559213ef2f30e4938a0956100000000; height: 740
2025-11-28T19:39:55.2073323Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:39:55.2088986Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 62.113.194.94:9798
requesting blocks descending from 5e3c0200c92bfc9c453f1b7a9d2dacf13aa3636924668085d559213ef2f30e4938a0956100000000
 height 740
2025-11-28T19:40:06.4000054Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: a65e39b8a8edc0c1eb077562a8c457692afaa27012ffdcbea497232a4b0c0f7c59fffd9c00000000; height: 775
2025-11-28T19:40:07.6336235Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:40:07.6349963Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 51.15.139.238:9798
requesting blocks descending from a65e39b8a8edc0c1eb077562a8c457692afaa27012ffdcbea497232a4b0c0f7c59fffd9c00000000
 height 775
2025-11-28T19:40:20.4735693Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Last block from peer is new canonical tip: c301e63a89af2dc8f974d98c7458896a45069d4d954117df3e6d73a2f22cdd99b525eb0c00000000; height: 810
2025-11-28T19:40:22.661649Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Creating new sync request
2025-11-28T19:40:22.6633257Z  INFO ThreadId(01) neptune_cash::application::loops::main_loop: Sending block batch request to 66.23.193.243:9798
requesting blocks descending from c301e63a89af2dc8f974d98c7458896a45069d4d954117df3e6d73a2f22cdd99b525eb0c00000000
 height 810
2025-11-28T19:40:36.3623912Z  INFO ThreadId(13) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:40:43.5065135Z  WARN ThreadId(16) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:40:43.5067164Z  INFO ThreadId(16) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:40:52.7357594Z  WARN ThreadId(01) neptune_cash::application::loops::main_loop: Sync mode has timed out. Abandoning sync mode.
2025-11-28T19:40:52.7360567Z  WARN ThreadId(13) neptune_cash::application::loops::peer_loop: Punishing peer 62.113.194.94 for SynchronizationTimeout
2025-11-28T19:40:52.7361973Z  WARN ThreadId(13) neptune_cash::application::loops::peer_loop: Punishing peer 139.162.193.206 for SynchronizationTimeout
2025-11-28T19:40:52.736323Z  WARN ThreadId(14) neptune_cash::application::loops::peer_loop: Punishing peer 66.23.193.243 for SynchronizationTimeout
2025-11-28T19:40:52.7364532Z  WARN ThreadId(15) neptune_cash::application::loops::peer_loop: Punishing peer 51.15.139.238 for SynchronizationTimeout
2025-11-28T19:42:36.3719137Z  INFO ThreadId(15) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:42:44.5682712Z  WARN ThreadId(15) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. (os error 10060)
2025-11-28T19:42:44.5686369Z  INFO ThreadId(15) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:44:36.3771877Z  INFO ThreadId(02) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:44:38.6344848Z  WARN ThreadId(15) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:44:38.6347863Z  INFO ThreadId(15) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing
2025-11-28T19:46:36.3873296Z  INFO ThreadId(11) neptune_cash::application::loops::connect_to_peers: Connection to [::ffff:217.76.50.184]:9798 closing
2025-11-28T19:46:38.6454485Z  WARN ThreadId(15) neptune_cash::application::loops::connect_to_peers: Failed to establish TCP connection to 194.190.216.153:49798: No connection could be made because the target machine actively refused it. (os error 10061)
2025-11-28T19:46:38.645672Z  INFO ThreadId(15) neptune_cash::application::loops::connect_to_peers: Connection to 194.190.216.153:49798 closing

[dan-da]

I also experienced some issues with not being able to connect 51.15.139.238:9798 and 139.162.193.206:9798 after upgrade to 0.5.0, which I believe are supposed to be bootstrap nodes. I thought perhaps my node got itself banned somehow. I eventually was able to connect to some other peers and get synced.

Checking now, at least a week later, I still do not see either of those nodes as peers.

@aszepieniec or @Sword-Smith can you take a look? It seems a significant problem if people can't reliably connect to the nodes listed in the README.

[aszepieniec]

@codewordneptune: Your problem is related to syncing, and is unrelated to establishing a connection to peers. Have a look at the development branch asz/parallel-block-download for an implementation of a faster syncing procedure (which still uses the same mechanism for connecting to peers).

Last week I was able to connect to peers, even though I had trouble downloading blocks.

Likewise, the difficulty of downloading blocks after establishing a connection to peers (syncing) is a separate issue from establishing the connection in the first place.

I also tried just neptune-core , without --peer

Presently, there are no hardcoded bootstrapper nodes in the source. Therefore, if you execute the binary with no --peer arguments, it will not be able to connect to anyone unless they connect to you.

The OP's logs strike me as indicative of a problem with the networking layer. Perhaps a firewall, or a NAT, is getting in the way. I am hoping such issues can be resolved by migrating to libp2p. @skaunov @Sword-Smith can you chime in?

@dan-da Your issues seem related to the reputation mechanism rather than networking. I'll reset the standings in one of the bootstrapper nodes; that should get rid of all bans, accidental or not.

[codewordneptune]

This does not address the underlying issue, but would it be worthwhile for the node to automatically attempt to connect to the small set of known master nodes if the user does not explicitly specify any peers at startup?

[mehdi-d-b]

@aszepieniec thanks for your answer. I'm currently using WSL on Windows 11 so maybe it's related. I'll do some tests when I can, next week.

[dan-da]

@dan-da Your issues seem related to the reputation mechanism rather than networking. I'll reset the standings in one of the bootstrapper nodes; that should get rid of all bans, accidental or not.

thx. Perhaps @mehdi-d-b had a node get banned also. If so, that should resolve the issue for both of us, for now.

musings:

1. Perhaps the banning should auto-reset itself after some time period, eg 1 day. At least on the bootstrapper nodes.
2. iirc, my logs did not indicate that the bootstrap peers had banned my node. That makes troubleshooting more difficult.
3. long term I think we will need something more resilient and less centralized, such as bitcoins DNS based system for finding initial set of peers.
4. is there any incentive for people to run bootstrap nodes? I guess the main one is just rational self-interest if they want the network to succeed/flourish, and have time/money invested into it.
5. if a 3rd party wanted to run a bootstrap node, it seems there is presently no place for them to get it listed, so that kind of defeats the purpose. We (or anyone) could start a forum thread for that purpose. Low tech, but should work.

edit: I started a forum thread for this purpose:
https://talk.neptune.cash/t/list-of-bootstrap-nodes-add-yours-here/185

[mehdi-d-b]

Hi,
Tried again with the bootstrap nodes:

• got Network is unreachable (os error 101) with host [2001:bc8:17c0:41e:46a8:42ff:fe22:e8e9]:9798
• got Didn't get handshake response from 51.15.139.238:9798
• 139.162.193.206:9798 is successfully sending blocks!
  I guess the host unbanned me?
  I am (slowly) catching up, using @dan-da 's patch.
  Thanks