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PPTP problems in 6.002

Since moving to version 6, our teleworkers and roadwarriors are getting dropped unexpectedly all the time - which had never been a problem before. I also see *a lot* of 'discarding out of order packet' error messages along with the bad csum messages we had before.

We've just doubled our external bandwidth by adding a second T1, I would expect a lot less problems, especially with PPTP - but it seems a lot, lot worse.

Anyone have any ideas ?

Mike

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0 Mike_Cunningham over 20 years ago

To add additional information, we're getting more error messages now:

tcflush failed: Bad file descriptor
tcSetattr: Invalid argument (line 1001)

This is really becoming quite serious for us - does anyone have any suggestions ?

Mike
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0 VelvetFog over 20 years ago in reply to Mike_Cunningham

Increasing the PPTP timeout value, which I did on my ASL v4 box last year, eliminated the VPN drop out problem for me. Since then PPTP connections have been rock solid, I have been able to leave them up for days. There is no setting for it in webadmin, so you'll have to edit the appropriate script manually.

Here is the link to last year's thread on this issue:

https://community.sophos.com/products/unified-threat-management/astaroorg/f/51/t/21514
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0 VelvetFog over 20 years ago in reply to Mike_Cunningham

Increasing the PPTP timeout value, which I did on my ASL v4 box last year, eliminated the VPN drop out problem for me. Since then PPTP connections have been rock solid, I have been able to leave them up for days. There is no setting for it in webadmin, so you'll have to edit the appropriate script manually.

Here is the link to last year's thread on this issue:

https://community.sophos.com/products/unified-threat-management/astaroorg/f/51/t/21514
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0 Mike_Cunningham over 20 years ago in reply to VelvetFog

Thanks for the link - I'll try modifying the echo failure and echo interval settings.

FYI - we downgraded to 5.2 and the VPN connections are much more stable today - I wonder what in v6 has changed so much to make PPTP unstable ?

Mike
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0 VelvetFog over 20 years ago in reply to Mike_Cunningham

Now that I have set up ASL at the office, I have had a chance to use the PPTP VPN capabilities in ASL v6.004. I have not had any dropped connections so far, but then my VPN traffic doesn't travel very far, since both the office and my home use ADSL service from the same provider (Telus). The PPTP service in ASL v6.004 has shown itself to be quite reliable in this environment, where it is unlikely to suffer from packet drop problems
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