I'm new here, so hello!
I have 18.06 on 1900ACS v2, one problem, i'm runing wan with fixed IP and pptp vpn with fixed ip network.
All good when on wan zone input is accept, but once i set input on wan as reject i have problem with connection. log rejects GRE protocol then. I tried lot of firewall settings, tested by opening/closing ssh or another ports, so looks firewall itself works correctly, but no matter what rule i make, it won't pass GRE, i tried also iptables, ipening 1723 port won't help.
PC's with pptp separate clients can connect even if wan input is set as reject.
Error i'm getting:
Thu Sep 27 09:44:10 2018 kern.warn kernel: [25679.479676] REJECT zonewan in: IN=eth1.1 OUT= MAC=xxxxxxx SRC=VPNPROVIDERIP DST=WANIP LEN=92 TOS=0x00 PREC=0x00 TTL=110 ID=28014 PROTO=47