OK, I finally got the Connect client working on Debian Stretch. (64-bit, if it matters). CLI still broken (exits after I enter my password) but at least the GUI works.
And after all that, you should be able to route traffic through the VPN.
(ETA: I've only found the tun0 down/up trick necessary when using a split VPN configuration; when I use my employer's no-split configuration, it works right away. However, it also doesn't seem to clean up after itself as often.)
A few other things I should mention:
- I got the LD_LIBRARY_PATH trick from several other posts in these forums, but not sure where
- Without bringing the tun0 interface down and up again (and then waiting), 0 bytes will flow through to the other side of the VPN tunnel, even though it successfully connects.
- Simply bringing tun0 up is not enough, it's not just a matter of it being down int he first place.
Hopefully this helps Pulse debug whatever's messed up in the client!