[stunnel-users] Reverse DNS lookup in stunnel log possible?

Sat Jul 27 02:28:08 CEST 2013

It is slower because it would have to do a DNS lookup for every IP. Sure,
it could be cached but its just informational.

On Friday, July 26, 2013, mkanet at yahoo.com wrote:

> The benefit would be the added convenience of seeing meaningful DNS names
> instead of numeric IPs for those that prefer this.  The added load on
> stunnel would be trivial for reverse dns lookups on separate process
> threads.
>
> -----------------
> What would be the benefit? It would slow stunnel down.
> On Jul 26, 2013 5:47 PM, "mkanet at yahoo.com <javascript:_e({}, 'cvml',
> 'mkanet at yahoo.com');>" <mkanet at yahoo.com <javascript:_e({}, 'cvml',
> 'mkanet at yahoo.com');>> wrote:
> Thanks, I guess I could do the equivalent with a batch file; but, was
> really hoping for buitin support for this in stunnel.  It would be nice to
> see in the upcoming 5.00 release as an option.
>
> -----------------
>
> Don't know on windows, but did a little test with a script to get the
> hostnames. First did a test using you records, and then used my current
> stunnel.log
>
> script stlog.chk
> ==================
> grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' /var/log/stunnel.log | sort | uniq
> >stout
>
> echo "" >stout2
> for a in `cat stout` ; do
>   echo -n $a " ">>stout2;
>   host $a | awk '{print $5}' >>stout2;
> done
>
>
> The results of stout2 are
> 127.0.0.1  localhost.
> 173.194.74.108  qe-in-f108.1e100.net.
> 173.194.74.109  qe-in-f109.1e100.net.
> 192.168.128.201  3(NXDOMAIN)
> 74.125.25.108  pa-in-f108.1e100.net.
> 74.125.25.109  pa-in-f109.1e100.net.
>
> Probable would want to add some code to filter out private address.
>
>
> Final step would be to scan original log and add the name on
>
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