network checks

[Jason Philbrook <jp...@saucer.midcoast.com>]

I'm wondering... Is there is a way to specify a particular DNS server for RBL 
checks only?

If not available, it might be a handy feature. I.E., I run rbldnsd on a couple 
RBL zone files. rbldnsd claims to be very fast and efficient for this purpose. 
In order to use those RBL checks, I have to setup a forwarder config for those 
zones in my regular bind 9.x nameserver. Ideally, I'd like RBL tests to go 
straight to my rbldnsd nameserver from SA, without going through the 
intermediate bind nameserver that I use for general purpose name resolution
in /etc/resolv.conf.

I'm looking for maximum performance of dns tests. My servers process 600,000
emails a day without network RBL tests. I want to add RBL checks but I can't let
RBL tests slow things down, or decrease reliability due to offsite nameserver/
internet trouble. So, I am slowly getting arrangements for locally nameserving 
the RBLs' zone files for tests I want to run.

TIA,
Jason

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Jason Philbrook   |   Midcoast Internet Solutions - Internet Access,
    KB1IOJ        |  Hosting, and TCP-IP Networks for Midcoast Maine
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Re: network checks

[Matt Kettler <mk...@evi-inc.com>]

At 10:43 AM 3/15/2004, Jason Philbrook wrote:
>I'm wondering... Is there is a way to specify a particular DNS server for RBL
>checks only?

Nope... SA treats all name resolution the same, and just uses Net::DNS to 
perform the lookups for MXes, RBLs and everything else.