On 2010-03-25 13:54, Mike Viau wrote:
Hello debian-users,

I have run into an interesting issue with the DNS resolution on only _one_ of my debian lenny systems on my network.

I have confirmed that this system has working network connectivity but I would like to restore the ability to query DNS records from my local DNS server which is also in my case my network gateway. Additionally I can ssh into the system easily while connected to the same local network 10.254.2.0/24

The working (as in with other systems on my network) DNS and router is at 10.254.2.254/24. The IP statically set for the debian system is 10.254.2.1/24

How is this machine configured differently than the other two?

Some info from this AMD64 architecture system is below.

r...@localhost:~# cat /etc/debian_version
5.0.4


r...@localhost:~# cat /etc/resolv.conf
domain site
search site

Why these two lines?

Why *before* the nameserver?

nameserver 10.254.2.254


How are you populating this file?

r...@localhost:~# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface 10.254.2.0 * 255.255.255.0 U 0 0 0 br200 default 10.254.2.254 0.0.0.0 UG 0 0 0 br200


Snippet from /etc/network/interfaces:

# LAN bridge
iface eth1.200 inet manual
auto br200
iface br200 inet static
 address 10.254.2.1

Why the non-standard interface name?

 network 10.254.2.0
 netmask 255.255.255.0
 broadcast 10.254.2.255
 gateway 10.254.2.254
 bridge-ports eth1.200


Why not add a dns-nameservers to "iface br200"?

r...@localhost:~# ping 66.249.90.104  (a google IP beyond local router)
PING 66.249.90.104 (66.249.90.104) 56(84) bytes of data.
64 bytes from 66.249.90.104: icmp_seq=1 ttl=53 time=25.7 ms
64 bytes from 66.249.90.104: icmp_seq=2 ttl=53 time=24.3 ms
64 bytes from 66.249.90.104: icmp_seq=3 ttl=53 time=25.0 ms


Can you ping 10.254.2.254?  I'm sure you can, but just asking.

r...@localhost:~# traceroute 66.249.90.104
traceroute to 66.249.90.104 (66.249.90.104), 30 hops max, 40 byte packets
 1  * * *
 2  * * *

Try mtr-tiny instead.


--
"History does not long entrust the care of freedom to the weak
or the timid."  Dwight Eisenhower


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