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Request for use of more than one DNS server

Printed From: LogSat Software
Category: Spam Filter ISP
Forum Name: Spam Filter ISP Support
Forum Description: General support for Spam Filter ISP
URL: https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=4973
Printed Date: 31 July 2025 at 11:16am


Topic: Request for use of more than one DNS server
Posted By: sirrar
Subject: Request for use of more than one DNS server
Date Posted: 15 January 2005 at 2:21am

Is it possible or will it be possible in future releases to let Spamfilter use more than one DNS server?

I just experienced af DNS server breakdown with the result that Spamfilters MAPS, MX and SPF filter was out of function. Which again resulted in a lot of spam mail. Only active filter was in my case keywords and bayesian.

 

Best regards...

Torsten Christiansen


Replies:
Posted By: Desperado
Date Posted: 16 January 2005 at 6:31pm

Torsten,

SpamFilter already *does* support multiple DNS Servers.
 
In the GUI just put as many servers as you want separated by commas.  Example
66.55.66.55,11.33.22.33
 
Regards,
Dan S.

Posted By: sirrar
Date Posted: 17 January 2005 at 1:37am

Hi again.

Sorry, I've completely overlooked that.

After putting in a second DNS server, I wanted to test it, but I didn't get it to work as I thought it would though. The primary DNS was shutdown (Then It (SF) should use the secondary) but is doesent, It gives me a socket error resulting in no MX lookup and mails goes to the quarantine. Spamfilter is running on a Win2K3. BTW. the server itself IP conf. uses same Prim and Sec. DNS server. DNS lookups works on that when shutting down the primary DNS.

A bit from SF.ini:

dns=192.168.1.2,212.242.40.3

A bit from my SF log:

01-17-05 07:25:20:108 -- (660) Connection from: xxx.xxx.xxx.xxx  -  Originating country : Denmark
01-17-05 07:25:20:409 -- (660) Resolving xxx.xxx.xxx.xxx - Error occurred during DNS lookup: Socket Error # 10054 Connection reset by peer.
01-17-05 07:25:20:409 -- (660) - Invalid MX record -
01-17-05 07:25:20:409 -- (660) xxx.xxx.xxx.xxx - Mail from:  mailto:xxx@xxx.xx" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - xxx@xxx.xx To: mailto:xxx@xxx.dk" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - xxx@xxx.dk  will be rejected
01-17-05 07:25:20:579 -- (660) EMail from  mailto:xxx@xxx.xx" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - xxx@xxx.xx to mailto:xxx@xxx.xx" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - xxx@xxx.xx was received and quarantined. Size: 1 KB, 1024 bytes
01-17-05 07:25:20:669 -- (660) Disconnect
01-17-05 07:25:21:160 -- (7568) Time to add Msg to Bayes corpus:139

Is it my or is there a bug n SF? (Running SF 2.1.2.395)

 

Best regards...

Torsten Christiansen

Posted By: Desperado
Date Posted: 17 January 2005 at 1:46am

When DNS Fails, you should get an entry that looks like:

01/17/05 00:02:26:252 -- DNS Server will rotate after query. New server will be 66.181.192.10

Are you not seeing these?

Dan

Posted By: sirrar
Date Posted: 17 January 2005 at 1:53am

Hi again.

Nope, sorry I don't. I just shutdown the prim DNS again. Sent 3 mails from the outside. Just keep getting:

Resolving xxx.xxx.xxx.xxx - Error occurred during DNS lookup: Socket Error # 10054 Connection reset by peer.
01-17-05 07:51:56:061 -- (6736) - Invalid MX record -

 

/Torsten Christiansen

Posted By: Desperado
Date Posted: 17 January 2005 at 2:00am

Hmm ... I shut my primary and secondayr down and my third one does the job.  I do not understand the "Socket Error" bit.   Can you send me your address to daseligmann at hotmail dot com?  I will then try to send uou a message from my server to see what happens there.  I will be in fromt of my maching for another 30 minuts or so ... 2:00am here.

Dan

 

Posted By: sirrar
Date Posted: 17 January 2005 at 2:09am

Yes of course

Prim DNS shutdown (service stopped).

Mail away.

Wating for your e-mail (and as a test, we will se if you get the mail, when prim dns down.

 

/Torsten Christiansen


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