Am Sa, den 20.11.2004 schrieb Bill Somerville um 2:12:
Thanks for that. Got to the bottom of this with logging on nameserver. It appears that ssh tries IPv6 as well as IPv4 and the AAAA lookup is being forwarded by our local nameserver, hence the wake up of pppd.
I know that I can rebuild ssh so that it only tries IPv4. But is there an easy way of setting up the local nameserver so that it doesn't forward the AAAA lookup?
Bill Somerville
Do you use IPv6? Maybe not. The only possibility to prevent IPv6 queries is to disable IPv6 on the participant hosts. You can do so by adding
install ipv6 /bin/true
to the /etc/modprobe.conf.
As an alternate
alias net-pf-10 off alias ipv6 off
are valid entries too. The quickest way would be a reboot to prevent the module loading, as unloading the ipv6 module is not that easy due to dependencies by other modules.
OK, thanks for the clarification. I didn't want to lose IPv6 (even though I hadn't enabled it so far!) so I added the IPv6 stuff to the nameserver and enabled dual stacks on all the machines.
It took a while to sort it all out and I wouldn't recommend it unless you have a need to use/test an IPv6 client or server. Still it's nearly all sysconfig parameter changes and it seems to work OK now including the auto 6to4 tunneling stuff at the gateway/router/firewall.
Alexander
Bill Somerville
