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MikroTik App
 
Pók
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Joined: Thu Apr 08, 2021 12:00 pm

Not working as L2TP/PPTP client

Thu Apr 08, 2021 12:09 pm

Hello,
I have RB962UiGS-5HacT2HnT device and I am trying to configure it to establish VPN connection to my org's network.
I have tried setting up both PPTP and L2TP but the 1st one is connecting but not working, the 2nd one is not connecting.
Super weird phenomenon is that if somobody else uses a PPTP connection while the MikroTik router connects, the PPTP connection works.
After the last other person disconnects, soon the MikroTik VPN also stops working again.
Both PPTP and L2TP work when used in Windows and of course independent whether someone else is connected or not.
On the other hand there is a Ubiquiti Unifi Security Gateway USG-PRO-4.
Does anyone have any idea how could I debug/solve this?
Ubiquiti has nothing on this.
 
Pók
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Posts: 2
Joined: Thu Apr 08, 2021 12:00 pm

Re: Not working as L2TP/PPTP client  [SOLVED]

Sun May 15, 2022 6:33 pm

It turns out it was the MTU. After lowering the Max MTU to 1400 the connection started working rock solid.

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