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schweikert / fping

High performance ping tool
https://fping.org
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fping6 issue with multiple addresses #314

Closed jbeez closed 4 months ago

jbeez commented 4 months ago

I have a wireguard setup on debian as a headend where about 4 nodes connect in. I'm using all IPv6 here. I setup two fping6 probes.

My Probes file has + FPing6 at the top with just the path to the binary defined, then underneath at the ++ level I have an FPing6Normal and an FPing6wg.

Problem: The FPing6Normal hosts in my Targets file are not generating a graph for remote hosts, but I can manually run the FPing6 binary with -S and the value I assigned to sourceaddress successfully.

It is generating a graph for the local machine itself, which isn't super useful to me but that is working for FPing6. I saw another issue in github here asking for a source interface instead, that would also be useful here as my public ipv6 address is subject to change.

In Targets, I even tried to define probe = FPing6Normal immediately before every host =, but no change in behavior.

jbeez commented 4 months ago

Did some debugging today, turns out the issue was related to packet sizes. I could send full 5000 byte packets inside WG tunnels, but I was limited outside of it