Hello,
I’ve set-up a L2TP server on RB1100AHx2, router OS 6.37.1. with radius authentication. Everything works fine except that my tunnel drops after a couple of minutes. I’m connecting from Win10 1607 build 14393.447. The logs from mkt show only terminating..hung-up. I tried changing the keepalive, tcp, mru. On windows the connection stays up for 10-15 seconds after i see the session drop from mikrotik.
I have no problem setting up l2tp between mikrotiks and session stays up for days so i’m guessing it’s windows specific.
The config i used is the same that works between mikrotiks, except for the radius part. Also i noticed the mtu stays at 1400 unless i set mrru to 1600. On mkt-to-mkt l2tp it’s 1450. This is the only difference i noticed.Really don’t know what to look for.
[@Mikrotik] /interface l2tp-server> server print
enabled: yes
max-mtu: 1460
max-mru: 1460
mrru: 1600
authentication: mschap2
keepalive-timeout: 30
max-sessions: unlimited
default-profile: L2TP-AD
use-ipsec: yes
ipsec-secret: ****
allow-fast-path: no
1 name=“L2TP-AD” local-address=****** remote-address=L2TP-Pool use-mpls=no
use-compression=yes use-encryption=yes only-one=default change-tcp-mss=no
use-upnp=no address-list=“” on-up=“” on-down=“”
This router has an l2tp-client interface to another mikrotik - this connection works ok. I noticed the mangle rules that adjust the mss for all ppp but since I couldn’t edit them(they are default and i can only delete them) and everything worked fine i left them untouched. I don’t even know if they’re what’s causing the problem.
Any help is kindly appreciated.