Tunnelling all traffic to remote sites – having issues

  • My goal is to route all the traffic from my branch office through the head office. To that end I used this guide and setup the IPSEC tunnel, firewall rules and NAT rules as outlined in the guide: https://doc.pfsense.org/index.php/Routing_internet_traffic_through_a_site-to-site_IPsec_tunnel

    Despite pings etc working in all directions I am having some trouble this. The tunnel comes up, and I can ping the head office pfSense from the branch office and vice versa. I can also ping from a machine at the branch office to a machine at the head office and vice versa.

    However internet seems to be extremely intermittent. Connections time out and at times web pages will load without any CSS formatting.

    What could be causing this? I have attached screenshots of the config at both ends if that helps.


    ![S2S ITL.png](/public/imported_attachments/1/S2S ITL.png)
    ![S2S ITL.png_thumb](/public/imported_attachments/1/S2S ITL.png_thumb)

  • I have found the fix.

    Had to enable "Clear invalid DF bits instead of dropping the packets" in System > Advanced > Firewall/NAT.