[Cialug] SMTP Proxy

[Tom Pohl]

I don't know your feelings, but that is one of the binaries I like to keep off my machines because if a bad guy wants to get in, having netcat already available is a wet dream :)

I definitely agree that adding the old IP to the new server is a good option if possible!

Thanks!
-Tom


On Aug 27, 2010, at 9:24 PM, Josh More wrote:

> Drifting off topic...
> 
> It's probably broken in most distros because you can do the same with netcat (nc on some distros), so redir may not be well maintained.
> 
> You can do all sorts of wacky fun with netcat.
> 
> -Josh More, CISSP, GIAC-GSLC, GIAC-GCIH, RHCE, NCLP
> morej at alliancetechnologies.net
> 515-245-7701
> 
> ________________________________________
> From: cialug-bounces at cialug.org [cialug-bounces at cialug.org] on behalf of Tom Pohl [tom at tcpconsulting.com]
> Sent: Friday, August 27, 2010 21:23
> To: Central Iowa Linux Users Group
> Subject: Re: [Cialug] SMTP Proxy
> 
> For simple redirection like this I use a tiny little program called redir that will allow you to listen on a TCP port and connect to another ip on another port. I would compile it by hand because I have found it to be broken on most distributions.
> 
> -Tom
> 
> 
> On Aug 27, 2010, at 6:48 PM, "Nathan C. Smith" <nathan.smith at ipmvs.com> wrote:
> 
>> Can anyone recommend an SMTP proxy?   This is for my internal network.  I want all email sent to x.x.x.x to go to y.y.y.y because x.x.x.x is being decommissioned and instead of trusting DNS I used IP addresses.  ;-)
>> 
>> I don't need anything done to the messages and no authentication is in use, so I think I'm looking for something really basic.  Until I learn to stop worrying and trust DNS.
>> 
>> 
>> Thanks.
>> 
>> -Nate
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