VoIP behind NethServer

I ran these two commands:

rmmod nf_nat_sip
rmmod nf_conntrack_sip

Then edited this line:

DONT_LOAD=

In these two files:

/etc/e-smith/templates/etc/shorewall/shorewall.conf/60options
/etc/shorewall/shorewall.conf

to:

DONT_LOAD=nf_nat_sip,nf_conntrack_sip