router:/etc # grep -r "ppp1" .
./sysconfig/SuSEfirewall2:# Examples: "ippp0 ippp1", "any dsl0"
./sysconfig/SuSEfirewall2:FW_DEV_INT="eth0 ppp0 ppp1 ppp2 ppp3 ppp4 ppp5 ppp6 ppp7 ppp8 ppp9"


## Type:        string
#
# 3.)
# Which are the interfaces that point to the internal network?
#
# Enter all trusted network interfaces here. If you are not
# connected to a trusted network (e.g. you have just a dialup) leave
# this empty.
#
# Format: space separated list of interface or configuration names
#
# Examples: "tr0", "eth0 eth1"
#
FW_DEV_INT="eth0 ppp0 ppp1 ppp2 ppp3 ppp4 ppp5 ppp6 ppp7 ppp8 ppp9"