I'm having intermittent problems with my TZ300. Occasionally, from remote computers that have successfully connected via SSL VPN to my server (SBS2008), user are receiving the following error:
"the server is not reachable. the server may be down or your internet settings may be down"
Some remote computers can't connect at all. I've reinstalled NetExtender, rebooted, had users try connecting by IP address, etc. but still can't pin this one down.