I seem to have strange problems that are related to the ipv6 module being enabled. Behaviour seems (so far at least) to differ between kernel versions: k_deflt-2.4.19-74 and k_deflt-2.4.19-340. The problem is seen as slow startup of certain networked Java applications using JBoss services. I traced the issue to failing DNS replies, i.e. timeouts but the problem was that there was DNS AAAA queries (IPv6 related) going on. And the server was unable to answer these - as it is serving IPv4. Having found that out using ethereal I checked from web and found out that disabling the IPv6 module via /etc/modules.conf drops off IPv6 stuff and might help - actually did help. However, I checked with an older version of the kernel - and probably some other stuff as well - and the whole thing seems to work OK there, with IPv6 module. Is there some explanation I have missed? Is this behaviour correct now, or was it earlier? Does this affect performance and possibly security due extra delays with DNS timeouts? Is the correct solution to disable the module via: # alias net-pf-10 ipv6 (in /etc/modules.conf) or is there better ways of dealing with this? It has quite a big hit on the application since the "normal" startup time is in the range of 0.7 seconds and these DNS timeouted AAAA queries push it somewhere between 15 and 20 seconds! br, timo