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Linux - Networking This forum is for any issue related to networks or networking.
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Old 02-17-2016, 10:02 PM   #1
Net_Spy
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Registered: Nov 2006
Posts: 119

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Multi Interface host resolving issue


Greetings,

I've 2 Wan Interface Eth0 , Eth1 and one out put Lan on eth1. Every thing was working perfect on both wan interfaces , suddenly few days back on eth2 an issue raised that its not resolving any of host indeed ive tried tracert ping nothing worked with domain name but when I ping 8.8.8.8 it does work or dig @8.8.8.8 bing.com it does resolve . I'm using google dns in /etc/resolve.conf

nameserver 8.8.8.8
nameserver 4.2.2.2

On other end when I shut down the interface eth2 and up the eth0 it does resolve hostname every thing work like a charm. even I did transfer the eth0 ISP on eth2 it does not work out :/ .


I've no local dns running . Im usind dns forwarder only for my local clients using dnsmasq and using google dns for them as well.


Any idea what's wrong with that.

Regards
Net_Spy
 
Old 02-24-2016, 11:51 PM   #2
officecase
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Registered: Jan 2007
Distribution: Centos, ArchLinux
Posts: 40

Rep: Reputation: 18
You might start by running tracepath to see how your computer is routing the traffic. You should also check your routing tables to see what your rules might be. See what your default gateway is. If you have 2 WAN ports then you might look into advanced routing. you can use virtual routing and give each WAN its own gateway.

Have a look here...

http://www.rjsystems.nl/en/2100-adv-routing.php
 
  


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