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help: Disable GRE connection tracking
# GRE shouldn't be disabled when PPTP is enabled because PPTP depends on it
create: cli-shell-api exists system conntrack modules pptp disable
if [ $? == 0 ]; then
# Unload PPTP modules if they are loaded
lsmod | grep -e "^nf_nat_pptp" 2>&1 >/dev/null
if [ $? == 0 ]; then
sudo rmmod nf_nat_pptp
sudo rmmod nf_conntrack_pptp
fi
# And GRE modules then
sudo rmmod nf_nat_proto_gre
sudo rmmod nf_conntrack_proto_gre
else
echo "Error: can not disable GRE connection tracking when PPTP connection tracking is enabled!"
exit 1
fi
delete: sudo modprobe nf_conntrack_proto_gre
sudo modprobe nf_nat_proto_gre
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