MTU ipsec site-to-site

RouterOS Beginner Basics
1

Configured an ipsec site-to-site tunnel.

I can’t open NAS synlogy from a computer on the other side of the tunnel through Windows Explorer.

The computers on the other side of the tunnel open normally.

The default MTU is 1500 everywhere.
NAS MTU=1500 also.

If I change MTU=1400 on the computer’s network interface, then the NAS opens.

What settings should I make on ipsec so that the NAS can open without changing the MTU on the network interface of the remote computer?

2

http://forum.mikrotik.com/t/trying-to-understand-the-need-for-mss-clamping/175749/1

I “ended” with MTU@1476 for IPSec IP or GRE tunnels

3

I can’t find where to change MTU for IPSEC IP using winbox :frowning: