[suse-security] SuSEfirewall 4.5 and pptp

Has anyone managed to enable pptp to work whilst using SuSEfirewall? I've managed to get it to work with PMfirewall but keep getting "input DENY ppp0 PROTO=1 192.168.x.x:8 192.168.x.x:0" messages when I use SuSEfirewall which is what i'd prefer to be using. Any ideas or tips would be greatly appreciated. Rgds Cameron