I just had an interesting thing happen.
I have an old (needs-to-be-retired) Linux distro for amateur radio stuff, called HamVoIP, which is running a quite old Archlinux.
Linux linkbox 5.4.75-1-ARCH #1 SMP PREEMPT Mon Nov 9 16:58:39 UTC 2020 armv7l GNU/Linux
This system has Tailscale installed, and is using a node on my Tailnet to route both incoming and outgoing traffic.
This ISP is using CG-NAT, and I want to direct traffic from the internet to an Asterisk PBX, so I have a Tailscale exit node appropriately configured for this purpose.
The registration IP address must match, so outgoing traffic is also sent through that system.
It's been fine for a while, but just this afternoon, this system could no longer access the internet. LAN and tailnet resources were fully accessible, including the exit node itself, but nothing would pass through, until I disabled the use of that exit node and enabled it again.
Have you tried turning it off and back on again?
Anyway, it's working now, but I really should make this system go away in favor of it's more modern 64-bit replacement. It's definitely easier to deal with. Just getting Tailscale to use an exit node in the first place was made more complicated by the old implementation of netfilter.





Martin
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