For IPv4, outgoing connections use the interface's primary IP as the default source IP for outgoing connections.
This doesn't appear to be the case for IPv6, at least on RHEL 5. I have a server that has some secondary IPv6 addresses assigned (the server is a recursive DNS server, and has a /128 secondary IP assigned that will be a "well-known" IP for DNS in our network). When I make an outgoing IPv6 connection (e.g. "telnet foo smtp"), it is choosing the secondary IP instead of the primary as the source IP (which will break ACLs and such). I googled around some, and see some recommendations about setting the preferred lifetime to 0 on IPs you don't want to use as the source as a hack around this issue, but the RHEL 5 "ip" command doesn't support setting the preferred_lft flag, nor does it support the "change" command. Anybody have any ideas about this? Is there another way to work around this? -- Chris Adams <[email protected]> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble. _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
