I''ve been exercising the IPsec some more today and I changed from just accessing zones around the firewall to using the tunnel as default route for some of the road warriors Subsequently, road warriors observed MTU problems, e.g. accessing both google.com and yahoo.com fails I tried putting mss=1400 in /etc/shorewall/zones (the value suggested in the documentation) but this didn''t resolve it for me - then I tried lower values, it seems to work for me with mss=1350. Maybe you can add a little more detail to the IPsec page: http://www.shorewall.net/IPSEC-2.6.html The easiest thing for users would be to start with a smaller and really conservative value (e.g. 1024) so that it "just works" for people following the guide, even if it is not the most efficient. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev