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MTU Settings for VPN Device's
When using VPN Devices with Sharedband then you will need to change the MTU Setting on either the VPN Tunnel itself, or more often the MTU Value of the WAN Connection that is connected to our Routers, This is because Sharedband uses a 32 byte header that your VPN Device doesn't account for.

The MTU you require can be calculated using your normal MTU and subtracting 32 bytes, In the UK a normal MTU on Standard ADSL is 1492, however with some providers and some newer exchanges this can be lower, you can find out your current MTU from the Sharedband Portal.

Log onto your customer account and click Status, then Router Status, you should now see a screen similar to this:

Click on the details link for the router and it will display details about your router, including WAN MTU.

With this value now subtract 28 bytes, in the example the MTU is 1492, so the VPN Tunnel/WAN MTU of your device will need to be 1460, below are some common MTU Value's

Sharedband MTUVPN/WAN MTU
1492 1460
1456 1424
1400 1368


If you have any problems with MTU Settings please Raise A Ticket