Unable to connect - wrong IP seen

Support
1

Weird issue im facing with syncthing Client 1 - Ubuntu machine. No docker. Bare bones install Client 2 - Synology NAS running Syncthing as a docker.

When I configure Client 1 to point to Client2 and specify the IP address of the NAS (192.168.3.3) it doesn’t connect.

Checking the logs of Client 1

2024-07-31 10:12:54 Failed to exchange Hello messages with GTOI7NT-CZ7ULI3-VYOPEKC-HHOSLON-DH3UXAU-TUVKCBL-IRKBAHP-UMDDCQ2 at 192.168.69.200:22000-192.168.3.3:22000/tcp-client/TLS1.3-TLS_AES_128_GCM_SHA256/WAN-P30-2VJL3AJ5P5VCO5ULR1PFOSA3EO: EOF

Checking the logs of Client 2

2024-07-31 10:12:54 Connection from JNOSKY2-JLU6Q5T-6P2Q7NI-7G22GDF-WZKBURQ-TLKNMCX-O25DYVD-V2J7MQW at 172.17.0.1:44452 (tcp-server) rejected: device is ignored

No clue why the NAS is seeing 172.17.0.1 address. What is very weird is i have Client 3 pointing to Client 2 (Synology NAS) and that works without issue.

2

The IP addresses don’t seem to be the problem here, but this:

You need to un-ignore the device on client 2 (Actions → Settings → Ignored Devices → Remove) if you want them to connect now (at some point in the past you told syncthing to ignore that other device, so they can’t connect now).

3

wow… Im hunting down why synology is treating this connectivity differently and you gave a very simple fix that works.

bravo.

Thank you !!