On Thu, 2008-03-27 at 11:12 -0600, Russell Wilton wrote:
> I run Exim 4.52 on RedHat Ent Linux 4.6
> 
> I am implementing Spamhaus DNS block lists and have set up my own rbl 
> DNS server
> for the purpose, as required by our volume of mail.  We have set our 
> main DNS servers
> to forward requests for the dnsbl zone to my new rbl DNS server, but we 
> are having difficulty
> meeting Spamhaus' requirement that we restrict access to only our own 
> machines.  We
> have a fairly complicated DNS setup and our DNS expert says he has been 
> unable to
> find a way to restrict forwarding without breaking something else.
> 
> It occurs to me that if there was some option for the dnslists condition 
> that would let me
> specify the DNS server to use, I could scrap the forwarding and just 
> restrict access to
> the rbl DNS server to only my mail systems.  I have read the docs fairly 
> closely but
> I don't see any mention of this type of functionality.  Am I missing 
> something?  Is there
> some other way to do this?  Any pointers greatly appreciated.
> 
> -- 
> Russell D. Wilton                     E Mail: [EMAIL PROTECTED]
> Info Tech Systems Analyst              Voice:  (403) 329-2525
> University of Lethbridge                 FAX:  (403) 382-7108
> 4401 University Drive   Lethbridge, Alberta, CANADA   T1K 3M4
> 
> 

You could simply create an A record like "MailServer1-rbl.example.com"
that points to your RBL DNS server and just use it from the exim dnsbl
ACL. You may not need to do any forwarding at all.


Jeff 



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