All, This is more a general question about a rash of DNS resolution issues that seem to be on the increase on my ipv4 network lately. They basically have to do with Bind 9 trying to resolve names with EDNS (and I guess the default UDP package size of 4K) I don't handle ipv6 at all. In my named.conf I have: listen-on-v6 { none; }; But regardless, I end up with a slew of messages, e.g. error (network unreachable) resolving 'gateway.discord.gg/A/IN': 2001:630:0:9::14#53 success resolving 'gateway.discord.gg/A' (in 'discord.gg'?) after reducing the advertised EDNS UDP packet size to 512 octets I don't understand why I'm seeing the attempts to resolve the ipv6 address to begin with? However, the same issue seems to effect normal ipv4 addresses, even opensuse.org, e.g. Dec 30 22:03:48 nirvana named[15060]: success resolving 'www.opensuse.org/A' (in 'opensuse.org'?) after reducing the advertised EDNS UDP packet size to 512 octets Dec 30 22:03:54 nirvana named[15060]: success resolving 'nshou1.novell.com/A' (in 'novell.com'?) after reducing the advertised EDNS UDP packet size to 512 octets Dec 30 22:03:54 nirvana named[15060]: success resolving 'nshou1.novell.com/AAAA' (in 'novell.com'?) after reducing the advertised EDNS UDP packet size to 512 octets Dec 30 22:03:54 nirvana named[15060]: success resolving 'opensuse.org/A' (in 'opensuse.org'?) after reducing the advertised EDNS UDP packet size to 512 octets Dec 30 22:03:54 nirvana named[15060]: success resolving 'opensuse.org/AAAA' (in 'opensuse.org'?) after reducing the advertised EDNS UDP packet size to 512 octets From Bind9ARM, I have set the EDNS UDP packet size to 512, but I'm still having the problems. I have included: edns-udp-size 512; and I still do not eliminate the "success ... after reducing the advertised EDNS UDP packet size to 512 octets" messages that are logged. The EDNS resolution is working, but only for 512 octets (the related posts seem to indicate this is a problem largely to do with misconfigured load-balancing and failover configurations of the target machines. I don't recall seeing much of this before a month or two ago -- so I don't know if it is at all related to the DNS over http growing pains or what... Has anyone else run into this problem -- or have a solution? The time it takes for Bind to try from UDP size of 4096 (default) to 512 on some sites with 50 linked domains can be quite noticeable. -- David C. Rankin, J.D.,P.E. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org