Draytek Vigor 2760n dial-in VPN update

Just spotted a useful firmware update from Draytek for their Vigor 2760 / 2760n / 2760Vn range which adds an important VPN feature.

In a previous article on the Draytek 2760 I mentioned that although the early revision of the hardware (which uses firmware 1.x) has dial-in VPN support (PPTP, L2TP) the later hardware revision with firmware 3.x didn't provide dial-in VPN. Got caught out by that change before!

Guess what Draytek fixed with the 3.8.2.1 firmware - they've added support for SSL VPN Remote Dial-In user connections. Excellent news - will be testing as soon as I get opportunity.

Cisco AnyConnect VPN reconnect resulted in different configurations settings error

This error is nothing to do with the Cisco setup or the configuration, well kind of. Its actually down to the packet size of the data on the network. You need to reduce the size of your MTU (Maximum Transmission Unit).

Quickest way is to start a Windows Command Prompt from Start > Programs > Accessories (in Win 7). Make sure you right-click and use Run As Admin.

Then type
   netsh interface ipv4 set subinterface "Local Area Connection" mtu=1300 store=persistent

or use "Wireless Connection" if appropriate.

You can also type
   netsh interface ipv4 show subinterfaces

to get a list of interfaces.

Or download a utility to do the job for you, c/o Cisco
http://sslvpn.emc.com/docs/setMTU.exe

Could be worth experimenting a bit to find what is the most appropriater MTU, using a higher value of 1400 might give slightly better performance.