here in PPTP configuration documentation
https://openwrt.org/docs/guide-user/services/vpn/pptp/basic
### Firewall configuration
##### Accept traffic from wan
config rule
option target 'ACCEPT'
option _name 'pptp'
option src 'wan'
option proto 'tcp'
option dest_port '1723'
config rule
option target 'ACCEPT'
option _name 'gre'
option src 'wan'
option proto '47'
there is used _name option
but in firewall documentation there is no _name option (there is name)
so this is mistake?? I should use name instead _name??
thanks in advance