Known Issues
- Some applications or servers may not work with DigiTunnel's default settings, even though DigiTunnel has connected successfully. In most cases, a lower mtu setting (mtu 700 or mtu 400) in Advanced preferences solves this problem. See Troubleshooting section. Also, note that many non-Windows VPN servers cannot be used with this version of DigiTunnel.
- Stateful (as opposed to stateless) encryption is not supported. This is reported in the connection log as "non-stateless encryption". Some older, non-upgraded servers may only have stateful encryption. To support DigiTunnel, these servers would have to be upgraded to stateless encryption.
- DAVE (Windows client software from Thursby) does not work over DigiTunnel's VPN . Dave users should not install DigiTunnel at this time.
- AFP file transfers can be slow with pauses in transmission.
- Parts of large packets to be sent may be delayed in kernel. This is not known to cause any problems, other than slower file transfers.
- Only one VPN connection at a time is supported (primarily a routing table issue).
- A newly changed password can be erased in certain circumstances. If your password expires and the server allows, DigiTunnel prompts you for a new password when you connect, then sets the password on the server and stores it in DigiTunnel Preferences. However, if DigiTunnel's Preferences panel is open during the change, the panel may overwrite the new password.
- You have to quit System Preferences before a new PPTP configuration will show up in Network Active Ports. However, Network Active Ports isn't really needed for configuring DigiTunnel, except perhaps to change the order of multiple connection services in Internet Connect.
- If connected automatically at login, modem (icon) menu does not show connected status. Workaround: For correct status (and to disconnect), open Internet Connect and choose the PPTP connection.
- If the server's VPN address is within the Mac's own subnet, connection problems will occur either during or after the VPN session. If you are connecting from a private IP range behind a NAT gateway, and the server's VPN address is in the same range, this causes routing problems. And when you disconnect, the normal route to your local network is deleted by Mac OS X. To recover, switch to another Location (Network preferences pane) and back. "VPN address" means the private address supplied by the server, not the server address in DigiTunnel's preferences pane.
- Passwords entered in DigiTunnel preferences are stored in the user's preferences file. The password is encrypted, but not stored in the Keychain.
- 2-byte (uncompressed) IP protocol headers are not supported. This shouldn't bother anybody.