Ok, r284746 is the root of the problem. MS DNS works under r284745 and doesn't work under r284746. Slawa, what should I look at in wireshark output?
2015-07-07 18:49 GMT+03:00 Slawa Olhovchenkov <s...@zxy.spb.ru>: > On Tue, Jul 07, 2015 at 06:04:46PM +0300, Pavel Timofeev wrote: > >> Well, turning off checksum offloading by `ifconfig hn0 -txcsum >> -rxcsum` definitely helps. >> >> As for tcpdump I'm not completely sure if I did it right, but I see >> "bad udp cksum" phrase: >> >> # tcpdump -i hn0 -vvv -nn udp dst port 53 >> tcpdump: listening on hn0, link-type EN10MB (Ethernet), capture size >> 262144 bytes >> 18:01:19.139994 IP (tos 0x0, ttl 64, id 61218, offset 0, flags [none], >> proto UDP (17), length 51) >> 192.168.25.26.45683 > 192.168.25.3.53: [bad udp cksum 0xb39e -> >> 0xf210!] 52886+ A? ya.ru. (23) >> 18:01:24.140544 IP (tos 0x0, ttl 64, id 17293, offset 0, flags [none], >> proto UDP (17), length 51) >> 192.168.25.26.12575 > 192.168.25.3.53: [bad udp cksum 0xb39e -> >> 0x7365!] 52886+ A? ya.ru. (23) > > tcpdump "bad udp cksum" is normal on FreeBSD host in case checksum > offload (and may be need only for help finding issuse in code). Need > wireshark capturing from MS DNS host (or from mirroring port). _______________________________________________ freebsd-virtualization@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
