Why my VPN connection does not work with cable modem ISP ?

[bs0000554]

I have a VPN configuration (PIX 501; OS 6.2; PDM 2.0 ;VPN client 3.5)

and all works in dialup and local ethernet connections.

Over cable modens they does not work.

should I use PPPoE ?

[awaheed]

Hi,

If you are trying to terminate the VPN on the PIX from the VPN client coming in from behind a Cable Modem, then its not possible a the IPSec/NAT feature is not supported for the PIX termination at this time.

Hope this helps,

Regards,

Aamir Waheed,

Cisco Systems, Inc.

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[jpersyn]

We had some kinf of simular problem but I placed our IPSEC in a TCP/80 tunnel. ADSL and dial-up were working fine, but cable modems weren't working at all.

By changing the IPSEC tunnel to UPD/10000, all dial-up devices were able to create the tunnel ( they didn't install PPPOE )