<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2715.400" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2><FONT size=2>
<P>Hello all. I just finished putting a iptables firewall together and
keep getting this log about every minute or so. It is comming from my
router on UDP port 520. From what I understand UDP port 520 is used for
local routing processes. Should I continue to block this traffic or allow
it. If I do allow it, what are the security conserns involved?
Thanks.</P>
<P> </P>
<P>May 3 09:38:36 Penguin kernel: UDP drop IN=eth0 OUT= </P>
<P>MAC=ff:ff:ff:ff:ff:ff:00:20:6f:06:fa:dc:08:00</P>
<P>SRC=$MY_ROUTER_ADDRESS DST=$MY_EXTERNAL_ADDRESS LEN=52 TOS=0x00 PREC=0x00
TTL=60 </P>
<P>ID=40617 PROTO=UDP SPT=520 DPT=520 LEN=32</P></FONT></FONT></DIV>
<DIV><FONT face=Arial size=2>Don Collier<BR><A
href="mailto:df_collier@hotmail.com">df_collier@hotmail.com</A></FONT></DIV></BODY></HTML>