Firewall rule for Strongswan setup

Installing and Using OpenWrt Network and Wireless Configuration
1

Hi,

I am configuring strongswan ikev2 server on my router by following the wiki link below:

[OpenWrt Wiki] IPsec Modern IKEv2 Road-Warrior Configuration

According to the wiki I should put the following firewall rules:

config rule 'ipsec_esp'
	option src 'wan'
	option name 'IPSec ESP'
	option proto 'esp'
	option target 'ACCEPT'
 
config rule 'ipsec_ike'
	option src 'wan'
	option name 'IPSec IKE'
	option proto 'udp'
	option dest_port '500'
	option target 'ACCEPT'

However, I already have the default rules created by openwrt itself:

config rule
	option name 'Allow-IPSec-ESP'
	option src 'wan'
	option dest 'lan'
	option proto 'esp'
	option target 'ACCEPT'

config rule
	option name 'Allow-ISAKMP'
	option src 'wan'
	option dest 'lan'
	option dest_port '500'
	option proto 'udp'
	option target 'ACCEPT'

I assume I should modify them as wiki said. I just do not know if it will affect something else by modifying the existing rules?

Thanks