[CentOS] CentOS 4.4 and dns cache

[Mário Gamito]

Luciano Miguel Ferreira Rocha wrote:

> Then please do an strace of yum and tcpdump port 53 and send the logs
> here.
strace:
write(2, "Cannot find a valid baseurl for "..., 45Cannot find a valid
baseurl for repo: update
) = 45
write(2, "Error: Cannot find a valid baseu"..., 52Error: Cannot find a
valid baseurl for repo: update

[root at mail new]# tcpdump -vv port 53
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96
bytes
22:55:01.978953 IP (tos 0x0, ttl  64, id 16651, offset 0, flags [DF],
proto 17, length: 72) mail.telbit.pt.61225 >
eth0-0.b.rbl-auth.sr.sonic.net.domain: [bad udp cksum 4532!]  42121 A?
python.org.multi.surbl.org. (44)
22:55:02.526241 IP (tos 0x0, ttl  64, id 16651, offset 0, flags [DF],
proto 17, length: 72) mail.telbit.pt.33261 > spamrbl2.mcafee.com.domain:
[bad udp cksum ce00!]  51135 A? python.org.multi.uribl.com. (44)
22:55:03.104622 IP (tos 0x0, ttl  64, id 16651, offset 0, flags [DF],
proto 17, length: 74) mail.telbit.pt.50508 > spamrbl2.mcafee.com.domain:
[bad udp cksum ecfb!]  9692 A? virginia.edu.multi.surbl.org. (46)
22:55:03.104645 IP (tos 0x0, ttl  64, id 16656, offset 0, flags [DF],
proto 17, length: 74) mail.telbit.pt.22097 > dnsbl.blacknight.ie.domain:
[bad udp cksum f533!]  20583 A? virginia.edu.multi.uribl.com. (46)
22:55:01.983398 IP (tos 0x0, ttl  64, id 16661, offset 0, flags [DF],
proto 17, length: 58) mail.telbit.pt.19802 > figwort.arin.net.domain:
[bad udp cksum 7a97!]  40306 NS? virginia.edu. (30)
22:55:01.983600 IP (tos 0x0, ttl  64, id 16661, offset 0, flags [DF],
proto 17, length: 86) mail.telbit.pt.56866 >
xlns3.returnpath.net.domain:  42634[|domain]
22:55:01.983759 IP (tos 0x0, ttl  64, id 16661, offset 0, flags [DF],
proto 17, length: 87) mail.telbit.pt.6123 > spns3.returnpath.net.domain:
 63864[|domain]
22:55:01.998373 IP (tos 0x0, ttl  64, id 16676, offset 0, flags [DF],
proto 17, length: 86) mail.telbit.pt.25387 >
xlns1.returnpath.net.domain:  56267[|domain]
22:55:01.998596 IP (tos 0x0, ttl  64, id 16676, offset 0, flags [DF],
proto 17, length: 78) mail.telbit.pt.1285 > ns6.njabl.org.domain: [bad
udp cksum 71ed!]  28273 A? 33.24.109.194.combined.njabl.org. (50)

9 packets captured
124 packets received by filter
0 packets dropped by kernel
[root at mail new]#

-- 
:wq! Mário Gamito