Per the manual: http://www.infradead.org/openconnect/manual.html I'm reading that if I've got to use --no-xmlpost to connect, I've got a bug that should be reported. So I'm trying to report it. =) Looks like myself and at least three others have come across this: https://bugs.launchpad.net/ubuntu/+source/openconnect/+bug/1229195 https://bugs.launchpad.net/ubuntu/+source/network-manager-openconnect/+bug/1202204 Is there some information I can provide that might help? I ran into this with the version of OpenConnect being piloted by Ubuntu 13.10: 5.01, GnuTLS, PKCS#11, TOTP software token, DTLS (using OpenSSL). I also ran into this using a version of 5.01 that I compiled with GnuTLS, PKCS#11, DTLS (using OpenSSL). I have no idea what most of this means, but I'd be glad to try to help. Mike