Conflict of IPSec between IPSec and business VPN tunnels

I crushed a 2821 current c2800nm-adventerprisek9 - mz.124 - 22.YB8 at home with 2 gre IPSec tunnels for personal use, and my office will be held that a customer based IPSec VPN to connect to the corporate VPN.  My problem is that when I want to connect to the corporate VPN, I see packages being encrypted and sent, but I would have never received the return packets.  It seems that the IPSec VPN tunnels with IPSec from my office and router packages conflict trying to decrypt and gives this error.  (I removed the public addresses for anonymity)

CRYPTO-4-RECVD_PKT_INV_SPI: decaps: rec would be package IPSEC a bad spi to destaddr = "myaddress", prot = 50, spi = 0xDB32344E (3677500494), port = "corpvpn".

When I remove the card encryption off-side WAN router, my Office VPN works immediately.  I can change the configuration, either on the side of the IPSec GRE tunnels, but has no way for me to change any configuration on the corporate VPN.  Does anyone know of a workaround on the cisco router?  I can provide the running configs or view orders.

The 2821 also performs NAT overload for internet access.

Hello, Reed.

1. try to remove the interface crypto map and add "protection... profile ipsec tunnel." "to your VTI:

Crypto ipsec IPSEC profile

solid Set trans

int g0/0

No crypto map card

int tu1

Ipsec IPSEC protection tunnel profile

int tu2

Ipsec IPSEC protection tunnel profile

2. try to force your corpVPN to use encapsulation UDP instead of ESP.

Tags: Cisco Security

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