Trouble shooting for dhcp

Please fire an issue if you don't find answers here or check the change log

1. Why I can't ping WAN after installing routing

It is probably because of an incorrect WAN configuration. Please follow the steps to check

• Execute make test_state to test current state, it should be RUNNING and all test cases should be passed (you can see a green True in the front of each statement).

• Then execute make showconf to check your configuration. Make sure LAN and WAN you filled are correct comparing with the result from ip link.

2. Why I can't ping public IP after install routing

It is probably because of an incorrect iptables rules added. Please follow the steps to check

• Run make test_state to test current state, it should be RUNNING and all test cases should be passed (you can see a green True in the front of each statement).

• Then check rules in iptables, make sure LAN and WAN are correct, e.g, if enp2s0 is WAN and br0 is LAN, then it should look like this:

  -P POSTROUTING ACCEPT
  -A POSTROUTING -o enp2s0 -j MASQUERADE 
  -P FORWARD ACCEPT
  -A FORWARD -i enp2s0 -o br0 -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m conntrack --ctstate NEW -j ACCEPT
  -A FORWARD -i enp2s0 -o br0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
  -A FORWARD -i br0 -o enp2s0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT