Multiwan - DNS problem when line failure occurs

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Multiwan - DNS problem when line failure occurs

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Hi all,

I have a strange behaviour here is my configuration:

ppp0 ( via eth0 ) : ISP1 (bridge modem)
eth1 : ISP2 ( bridge modem )
eth2 : internal LAN

DNS not autoconfigued from the ISP but set to opendns in the ipsettings menu.

When one ISP line goes down ( I tried both ) , dns from any client goes down, but if I login in Clearos nslookup or dig works!

So why dns query from clients doesnt work?
DHCP server is configured correctly to clients wiht DNS server set to Clearos LAN IP address ( the same as gateway).

Do you know some log where to look? resolv.conf is 127.0.0.1 and resolv-peers is correcly set to opendns servers.

any ideas?

thanks in advance,

Simone

In Multiwan

Sunday, September 15 2013, 03:00 PM

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Simonc

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Monday, September 23 2013, 04:59 PM - #Permalink
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Ok thanks!
I see there are a lot of threads admin can close this if needed !

If not and I find a solution I will let you know!
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Nick Howitt

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Friday, September 20 2013, 08:22 PM - #Permalink
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There have been a few reports of MultiWAN fail over problems recently. If you search the forums you should bump into them and somewhere in them is a request from the devs for logs when it happens.
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Simonc

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Friday, September 20 2013, 06:54 AM - #Permalink
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Anyone ?

I think this should be a classic multiwan scenario, so why this behaviour?
I followed clearos raccomandation to not set automatic dns on the wan interfaces, for multiwan scenario, and set public open dns globally .

My two WANs are eth and pppoe is this a possible problem? Do clearos have trouble managing two wan of different type like that?

Simon
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