> Hi Stelian - > Hello, please see my comments inside. > We'd need some more details to be able to advise : > > 1. How is your resolver set up ? > > Are you using only /etc/resolv.conf and the glibc resolver, > or are you running a local caching-nameserver (named) ? Only resolv.conf, no named. > Are you using NetworkManager ? Yes, but only starting from today. Yesterday I've updated from FC5 Test 2 to rawhide and, before that, in FC5 Test 2 I didn't use NetworkManager and the behavior was the same. BTW, I am using a wireless connection (I don't know if it's relevant or not). > Are you using nscd ? No. > What does your /etc/nsswitch.conf 'hosts:' line say ? > hosts: files dns > 2. Please quantify the problem - send us the /tmp/tcpdump.dns.log created by: > # tcpdump -vvv -ttt -nl -s 8192 -i any port domain >/tmp/tcpdump.dns.log 2>&1 & > # host a.name.that.takes.a.long.time.to.resolve > # pkill tcpdump > I've ran tcpdump with the syntax you've provided (I hope I did it correctly :-), here is the log. It seemed pretty fast to me (to resolve redhat.com), however, once I try it in Firefox, for example, it takes a much longer time. > NOTE: previous response to this issue: > On Wednesday 15 February 2006 13:53, John Reiser <jreiser@xxxxxxxxxxxx> wrote: > > Is the code waiting for timeout of non-existent IP6 routing? > > If so, then disable IP6. > This problem has been fixed for a long time in BIND, and should not be > a problem with glibc resolver - do you have any resolv.conf options settings ? I don't have any resolv.conf options settings, only the nameserver line. > > Thanks & Regards, > Jason Vas Dias > BIND package maintainer > Red Hat Inc. Many thanks! Stelian
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 8192 bytes 000000 arp who-has 192.168.2.3 tell 192.168.2.1 950445 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 60) 192.168.2.61.32789 > 192.168.2.1.domain: [udp sum ok] 39458+ A? www.redhat.com. (32) 034537 IP (tos 0x0, ttl 64, id 16752, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 001296 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 60) 192.168.2.61.32790 > 192.168.2.1.domain: [udp sum ok] 64721+ AAAA? www.redhat.com. (32) 002781 IP (tos 0x0, ttl 64, id 16753, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 000179 IP (tos 0xc0, ttl 64, id 27297, offset 0, flags [none], proto: ICMP (1), length: 104) 192.168.2.61 > 192.168.2.1: ICMP 192.168.2.61 udp port 32789 unreachable, length 84 IP (tos 0x0, ttl 64, id 16753, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 004936 IP (tos 0x0, ttl 64, id 16754, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 000193 IP (tos 0xc0, ttl 64, id 27298, offset 0, flags [none], proto: ICMP (1), length: 104) 192.168.2.61 > 192.168.2.1: ICMP 192.168.2.61 udp port 32789 unreachable, length 84 IP (tos 0x0, ttl 64, id 16754, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 029030 IP (tos 0x0, ttl 64, id 16759, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 000197 IP (tos 0xc0, ttl 64, id 27299, offset 0, flags [none], proto: ICMP (1), length: 104) 192.168.2.61 > 192.168.2.1: ICMP 192.168.2.61 udp port 32789 unreachable, length 84 IP (tos 0x0, ttl 64, id 16759, offset 0, flags [none], proto: UDP (17), length: 76) 192.168.2.1.domain > 192.168.2.61.32789: [udp sum ok] 39458 q: A? www.redhat.com. 1/0/0 www.redhat.com. A 209.132.177.50 (48) 005950 IP (tos 0x0, ttl 64, id 16760, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32790: [udp sum ok] 64721 q: AAAA? www.redhat.com. 0/0/0 (32) 001894 IP (tos 0x0, ttl 64, id 16761, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32790: [udp sum ok] 64721 q: AAAA? www.redhat.com. 0/0/0 (32) 000357 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto: UDP (17), length: 60) 192.168.2.61.32791 > 192.168.2.1.domain: [udp sum ok] 59059+ MX? www.redhat.com. (32) 004564 IP (tos 0x0, ttl 64, id 16762, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32790: [udp sum ok] 64721 q: AAAA? www.redhat.com. 0/0/0 (32) 000174 IP (tos 0xc0, ttl 64, id 27300, offset 0, flags [none], proto: ICMP (1), length: 88) 192.168.2.61 > 192.168.2.1: ICMP 192.168.2.61 udp port 32790 unreachable, length 68 IP (tos 0x0, ttl 64, id 16762, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32790: [udp sum ok] 64721 q: AAAA? www.redhat.com. 0/0/0 (32) 027685 IP (tos 0x0, ttl 64, id 16767, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32790: [udp sum ok] 64721 q: AAAA? www.redhat.com. 0/0/0 (32) 000177 IP (tos 0xc0, ttl 64, id 27301, offset 0, flags [none], proto: ICMP (1), length: 88) 192.168.2.61 > 192.168.2.1: ICMP 192.168.2.61 udp port 32790 unreachable, length 68 IP (tos 0x0, ttl 64, id 16767, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32790: [udp sum ok] 64721 q: AAAA? www.redhat.com. 0/0/0 (32) 004672 IP (tos 0x0, ttl 64, id 16768, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32791: [udp sum ok] 59059 q: MX? www.redhat.com. 0/0/0 (32) 006524 IP (tos 0x0, ttl 64, id 16769, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32791: [udp sum ok] 59059 q: MX? www.redhat.com. 0/0/0 (32) 000199 IP (tos 0xc0, ttl 64, id 27302, offset 0, flags [none], proto: ICMP (1), length: 88) 192.168.2.61 > 192.168.2.1: ICMP 192.168.2.61 udp port 32791 unreachable, length 68 IP (tos 0x0, ttl 64, id 16769, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32791: [udp sum ok] 59059 q: MX? www.redhat.com. 0/0/0 (32) 003814 IP (tos 0x0, ttl 64, id 16770, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32791: [udp sum ok] 59059 q: MX? www.redhat.com. 0/0/0 (32) 004127 IP (tos 0x0, ttl 64, id 16771, offset 0, flags [none], proto: UDP (17), length: 60) 192.168.2.1.domain > 192.168.2.61.32791: [udp sum ok] 59059 q: MX? www.redhat.com. 0/0/0 (32) 2. 411985 arp who-has 192.168.2.3 tell 192.168.2.1 5. 429607 arp who-has 192.168.2.3 tell 192.168.2.1 1. 184057 arp who-has 192.168.2.3 tell 192.168.2.1 25 packets captured 50 packets received by filter 0 packets dropped by kernel
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