Bind, Sendmail and RBL

[Bryan Bradsby]

On Wed, 27 Sep 2000, Jorg B. wrote:

> I have a problem using the RBL with sendmail (8.11.0) and since it ties in with
> Bind I thought this may be a good place to ask this question:
> 
> DNS to be a stealth slave of the rbl.maps.vix.com zone. 
> I'm getting regular updates (zone transfers) from the master RBL server,
> therefore I know that this part works.
> 
> Here is what I have within my named.conf file:
> 
> zone "rbl.maps.vix.com" 
> { 
>   type slave; 
>   file "sec/rbl.maps.vix.com"; 
>   allow-transfer { none; }; 
>   masters {204.152.184.74; }; 
> };
> 
> 
> Now to sendmail:
> 
> I have FEATURE(dnsbl, `ns.domain.com') within my sendmail mc file... (where
> ns.domain.com is my DNS server that is our RBL stealth slave).

The RBL works by looking up an IP address in the RBL zone. 

You are attempting to lookup 2.0.0.127.ns.domain.com, which does not
exist, so that IP is not blocked. 

However 2.0.0.127.rbl.maps.vix.com, does have an A record, so that IP is
blocked by sendmail.

Just make your sendmail (linux resolver) look locally for the stealth
zone. But I thought this was the default action. Where is the problem?


> Thanks for your help.
> 
> Jorg B.

-bryan bradsby
Capnet