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SalishSeaSecurity's avatar
SalishSeaSecurity
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Jul 22, 2009

Ubuntu 8.04 tunnel failure

The tunnel connection has failed on my Ubuntu 8.04 workstation using Firefox 3.0.11. This happened in two stages.

 

 

1) I began to receive a pop-up window with the message "Connection dropped". After I while I figured out that the tunnel had indeed come up, and as long as I didn't click on "OK", the tunnel would stay up. Very odd, but I could work with it.

 

 

2) Suddenly the tunnel wouldn't come up at all. It didn't take long to figure out that pppd wasn't starting. What I haven't been able to figure out is why.

 

 

I manually removed the vpn components. Automatic reinstall of the components failed. I manually reinstalled them. Still no joy. Still no pppd. I can manually start pppd, so I know it functions.

 

 

Can anyone at F5 chime in with further troubleshooting tips? Any other Linux users experienced this?

 

 

- J
BIG-IP Access Policy Manager (APM)
remote access
security

2 Replies

  • SalishSeaSecurity's avatar
    SalishSeaSecurity
    Icon for Altostratus rankAltostratus
    Nov 09, 2009
    Here's a follow-up to my own post in the hope that it might help someone else. After having given up trying to fix the problem, I thought I would revisit it after upgrading to Firepass 6.1.0. Same problem. Someone pointed me to NoScript as the source of the problem. But how could that be? I had already put the VPN servers on the NoScript whitelist. It can be -- disabling NoScript solves the problem. Then I found this from the NoScript FAQ.

     

     

    Q: ABE seems to be preventing the F5 Network Access Plugin VPN from working. What can I do?

     

    A: Open NoScript Options|Advanced|ABE, select the SYSTEM ruleset, click "Edit" and insert the following rule at the beginning of the file:

     

     

    F5 VPN exception

     

    Site http://127.0.0.1:44444

     

    Accept