DNS not working well on ubuntu8
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From: Moe Trin on 4 May 2008 20:36 On Sun, 04 May 2008, in the Usenet newsgroup comp.os.linux.networking, in article <fvj135$s5q$1(a)aioe.org>, David Shen wrote: >Bill Marcum wrote: >> On 2008-05-03, David Shen <davidshen84(a)googlemail.com> wrote: >>> >>> My /etc/resolv.conf file looks like this: >>> >>> search my.corp.domain.com You may want to look at 'man 5 resolver' to see if that line is really useful. Depending on the situation, this can be a security problem. >>> nameserver ip1 >>> nameserver ip2 >>> nameserver ip3 >>> >>> I compared the IPs and the domain name with what was get from one of >>> my Windows PC, they are the same. So, I think it should work. From that aspect - yes. The next question might be routing and firewalls. >> Make sure you can ping at least one of those addresses. You might >> need a route command. > >errr...I cannot ping those DNS server... Ping uses ICMP packets (DNS normally uses UDP) and has been abused so much that many block pings in defense. >I used route -n, and the return look like this: >12.34.56.0 0.0.0.0 255.255.255.0 U >0.0.0.0 12.34.56.1 0.0.0.0 UG 12.34.56.xx is actually 8 different sub-nets from a /29 to a /25, but assuming the actual values you see are similar, this is ok. >And I just noticed, I cannot ping any machine now...But I could before. >I do not remember I changed the machine's configuration. And the error message is... 1. cables 2. /sbin/ifconfig -a 3. /sbin/iptables -Ln 4. /usr/sbin/traceroute -n 72.14.214.193 Old guy |