[10:07] <sveinse> My server accumulates a lot of deprecated ipv6 addrs. Isn't there a cleanup in 20.04 that deletes old obsolete addrs?
[10:09] <sveinse> I have an ISP that assigns prefix via DHCPv6-PD and due to router restarts and we had a day with lots of changing ipv6 prefixes. But that's a week ago, but they are still all listed in all of the ubuntu servers. Do I need to clean them manually?
[10:12] <sveinse> I see that ip addr reports a "valid_lft" field in secs for each addr, and that its very high. Where is this number coming from? The external PD or is it an ubuntu setting?
[10:16] <xnox> sveinse:  https://datatracker.ietf.org/doc/html/rfc8415 skimming through it implies that the dhcp server issues valid & preffered lft for prefixes and autoconfigured ip addresses. I don't think we specify anything special.
[10:16] <xnox> it does matter what lifetimes your router got; and which lifetimes machines got from router.
[10:17] <xnox> i suspect ISP was giving out long lasting lifetimes.....
[10:19] <sveinse> xnox: yeah, I think that might be correct. Thanks. 300k seconds remaining on something is very long. Must debug the PD packages from the ISP I think
[10:30] <rbasak> 300k seconds is less than half a week. Not too long on the timescale of some TCP connections that some might want not to vanish.
[11:00] <sveinse> rbasak: I can't see there is any TCP connection remaining if you've lost your former PD and route. I believe the ISP router won't know how to route the IP packages (I think).
[13:38] <patdk-lap> your server wouldn't know the route has gone missing
[20:05] <Comnenus> Anyone know if this packaged anywhere?  https://github.com/Scribery/tlog
[20:16] <Comnenus> I have come across this, but in 20.04 sssd-common is at 1.16, and this doesn't seem to be part of it?  http://manpages.ubuntu.com/manpages/focal/man5/sssd-session-recording.5.html
[20:17] <sarnold> Comnenus: sssd is at 1.16 in 18.04, 2.2.3 in 20.04 -- https://launchpad.net/ubuntu/+source/sssd
[20:18] <sarnold> Comnenus: but of course if tlog isn't packaged at all, it might be moot
[20:18] <sarnold> Comnenus: there's a pam_tty_audit(8) but I've never tried it
[20:24] <Comnenus> sarnold: hmm......