Hi Team,
I have a MikroTik RB750Gr3 behind a NAT router (Fortigate).
The Fortigate is forwarding UDP ports 500 and 4500 and ESP value 50 to the internal IP address of the RB750Gr3.
The connection works, sometimes.
My laptop can connect to the VPN on 1 internet connection and not on another.
Some of the clients can connect and others cannot.
I replicated the same setup on my home network and got the same results.
Someone suggested adjusting the MTU. So I had a play with that on both the RB750Gr3 and the PC but neither made any difference.
The same person also said to enable nat-traversal but I cannot find it. It no long seems to be in this section:
/ip ipsec peer
add generate-policy=yes hash-algorithm=sha1 nat-traversal=yes secret=test123456
What have I done wrong?
Please help.
Thanks,
Callum