The Oxford IT services VPN server requires the usual details:
- Server =
- Group name =
- Group secret = as specified by IT,
- User name = same as SSO,
- User secret = remote access password.
But it also (newly in 2021) requires the Domain to be specified as the empty string. Neither the config file for command-line
vpnc nor the GUI for configuring it under Network Manager provides the means to specify the Domain as an empty string: the GUI in particular treats an empty Domain field (hidden under Advanced) as not specifying a domain at all.
The solution: use the command
$ dpkg-divert --local --divert /usr/sbin/vpnc.real --rename /usr/sbin/vpnc
vpnc.real, and then put the following script in
#!/bin/sh exec /usr/sbin/vpnc.real --domain "" $*