[SLUG] rp_filter issues on Smoothwall

[Rebecca Richards <r.richards@xxxxxxxxxxxxxxx>]

Guys,

I've been performing some work to configure VPN's on a Smoothwall 
firewall and come up against an interesting issue.

The firewall concerned is connected to the Internet via an ADSL link. 
Whenever the ADSL link dies, and is restarted, some process within 
Smoothwall does an echo 1 > /proc/sys/net/ipv4/ppp0/conf/rp_filter.  Now 
this is not a "bad-thing"(tm) in-and-of itself, but it apparently plays 
havoc with FreeS/WAN.

Does anyone know where Smoothwall is setting rp_filter on for the PPP 
interface after a PPP session is established?

--
Rebecca Richards, CCSA CCSE, Security Consultant, e-Secure Pty Ltd
"Secure in a Networked World"   Phone:  (02) 9438 4984 Fax: (02) 9438 4986
Grnd Floor, 71-73 Chandos St    Mobile: 0412 823 206
St Leonards NSW Australia       Email:  r.richards@xxxxxxxxxxxxxxx
ACN 068 798 194                 http://www.e-secure.com.au