I ran a iptable command and it worked. But when I rebooted the router it went away. Can someone list all steps how to save this command?
You should put the iptables commands in
/etc/firewall.user. It's executed during boot and firewall restarts.
Can I do this using gui?
/etc/firewall.user can be edited on the page Firewall - Custom Rules.
How can I write these two commands in firewall.user ?
ip route delete default via 192.168.100.240 dev eth0.2
ip route add default via 192.168.100.240 dev br-lan
It is not firewall command, it is route command.