[soled] Site B ping site A but site A does not ping site B

violinipa

Hi forum!
I have 2 pfsense configured in OpenVPN site to site
The connection is made properly but if i use the tunnel in /24 mode (10.128.0.0/24) the ping from site A to site B does not work
If i change the tunnel in /30 mode (10.128.0.0/30) the ping work in both direction (i tried /30 only for troubleshooting, i need /24 because i have many vpn clients)

Site A config (Server )

Lan Subnet: 10.0.1.0/24

Server mode: Peer to Peer
Protocol: TCP
Device mode: tun
Interface: WAN
Local port: 443
IPv4 Tunnel Networ: 10.128.0.0/24
IPv4 Local Network: 10.0.1.0/24

Site B config (Client)

Lan Subnet: 10.0.4.0/24

Server mode: Peer to Peer
Protocol: TCP
Device mode: tun
Interface: WAN
Server host or address: site B pubblic IP
Server port: 443

I have 100 or more client vpn site so i substitute the config "ipV4 Remote Networ" or the "Custom Option" route 10.0.x.0 255.255.255.0 with RIP
I enabled RIP service in all pfSense and i selected LAN and OpenVPN interfaces

The routing tables its seems corrects but the traffic work only from client to server

thank you for your help

violinipa

I missed iroute in client overrides :)

From official documentations:
For a site-to-site SSL/TLS server using IPv4, the IPv4 Tunnel Network size can alter how the server behaves. If x.x.x.x/30 is entered for the IPv4 Tunnel Network then the server will use a peer-to-peer mode much like Shared Key operates: It can only have one client, does not require client-specific overrides or iroutes, but also cannot push routes or settings to clients. If an IPv4 Tunnel Network larger than that is used, such as x.x.x.x/24, the server will accept multiple clients and can push settings, but does require iroutes.