<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7638.1">
<TITLE>Can Radiator Originate DNS Requests?</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf format -->
<P><FONT SIZE=2 FACE="Lucida Console">Hi,</FONT>
</P>
<P><FONT SIZE=2 FACE="Lucida Console">Sorry if this is a dumb question.</FONT>
</P>
<P><FONT SIZE=2 FACE="Lucida Console">We're using Radiator 3.17 on Sun T1000s/Solaris 10, with an Oracle IP allocation database. </FONT>
</P>
<P><FONT SIZE=2 FACE="Lucida Console">When a request is handled that requires an IP allocation from a full or non-existent, we have Radiator set up to log 'NO_IP' as the fail code in our auth logfiles.</FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">When 'NO_IP' auth events are logged, we are seeing DNS requests being sent from our Radiator app servers and are trying to work out why </FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">Here's an example, snipped from a local firewall log -</FONT>
</P>
<P><FONT SIZE=2 FACE="Lucida Console">13:22:45.067097 193.113.200.200.domain > 192.168.63.50.42509: 55048 NXDomain q: A? RAD3PS1. 0/1/0 ns: . SOA[|domain] (DF) (ttl 255, id 52304, len 128)</FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">13:22:45.067269 193.113.200.200.domain > 192.168.63.50.42509: 55048 NXDomain q: A? RAD3PS1. 0/1/0 ns: . SOA[|domain] (DF) (ttl 254, id 52304, len 128)</FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">13:22:46.111757 193.113.200.200.domain > 192.168.63.50.42510: 36206 NXDomain* q: A? NO_IP.london.02.net. 0/1/0 ns: london.02.net. SOA[|domain] (DF) (ttl 255, id 52305, len 117)</FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">13:22:46.111952 193.113.200.200.domain > 192.168.63.50.42510: 36206 NXDomain* q: A? NO_IP.london.02.net. 0/1/0 ns: london.02.net. SOA[|domain] (DF) (ttl </FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">192.168.63.50 isn't actually bound to a radiusd process, but it is the front end physical interface for one our Radiator servers. </FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">It suggests that the server wants to send some sort of message triggered by the NO_IP event, but I can't find anything in our Radiator configs to hint at why this should happen. Our unix admins have looked on the servers (including the perl modules Radiator uses) but haven't found anything either. Maybe we haven't looked closely enough.</FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">So, can you please suggest any circumstances under which Radiator (or one of perl modules that supports it) might send DNS requests?</FONT></P>
<P><FONT SIZE=2 FACE="Lucida Console">Thanks</FONT>
</P>
<P><FONT SIZE=2 FACE="Lucida Console">Tim</FONT>
</P>
<P><B><FONT COLOR="#000080" SIZE=2 FACE="Verdana">Tim Selim</FONT></B> <FONT COLOR="#008080" SIZE=2 FACE="Verdana">Data Access Designer</FONT>
</P>
<P><B><FONT COLOR="#000080" SIZE=2 FACE="Verdana">Telefónica O2 UK Limited</FONT></B>
</P>
</BODY>
</HTML>