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