Hi,
I'm trying to configure L2TP as a client, but it needs to connect to a server which runs its service on a different port than 1701.
Is there any way to change the destination UDP port away from the standard 1701?
Thanks in advance.

Did you try :port after the address? Maybe it works.

Not possible directly.

Yes, I've tried :port, but it's not being accepted as entry.

@mrz: Does "not directly" mean not at all or maybe possible with some sort of trick?

Of course you can try dstnat...

Not sure if I'm doing it right, just tried with: However, I still see packets leaving with 1701 as destination and the counters for this rule are not increasing.
To be honest I would not even expect this to work, why should the box send it's own traffic through this chain?
Thanks for this idea though.

DST nat wont work because it is processed in prerouting. Locally originated packets do not get into prerouting chain.

You can change port if you add another device between server and client adn run DST NAT there.

OK, so it's not possible with a device on the border of the network
Would you please consider to add a variable destination port for L2TP in a future routeros version?

is this feature still not added as of 6.38.1? why can we not change the port L2TP uses?

I under stand we can add another MT but thats another point of failure and another device to have to manage (for just one simple feature request).

tks