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Re: [FW-1] FW: [FW-1] Cisco->FW1 VPN timeout problem



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>>> Zelljko Stanivuk <[email protected]> 02/19/02 01:04PM >>>
UNSUBSCRIBE

-----Original Message-----
From: John Gesualdi [mailto:[email protected]]
Sent: Tuesday, February 19, 2002 12:30 PM
To: [email protected]
Subject: [FW-1] Cisco->FW1 VPN timeout problem


Hi ,
I keep ketting these messages on my Cisco router. When these messages
come up the VPN goes down for a few minutes and then automatically fixes
itself. Here's the message:

IPSEC (decapsulation):error is decapsulation crypto ipsec_sa_exists.
crypto-4-recvd_inv_SPI: decaps: rec'd IPSEC packet has invalid SPI
destaddr=x.x.x.x, prot=50,spi=0x2f0j2500 ( 535353526)


The emote office Cisco router is connected to my firewall using an IPSEC
VPN. It's using IKE for the keys. On the Checkpoint firewall1 encryption
propeties tab it  says  "renegotiate IKE SA every 52 minutes"  and
"renegotiate IPSEC SA's every 3600 seconds.

On the Cisco router if I do "sh crypto isakmp policy". I see the
lifetime set for 3120 seconds ( which equates to 52 minutes). If I do a
"sh crypto ipsec security-association-lifetime". I see 4608000
kilobytes/3600 seconds which also matches the checkpoint properties tab.

Please help.







--


John A. Gesualdi,    CCNP, CCDP, MCSE 2000
[email protected]
The Providence Journal Company
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