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IP NAT outside causes VPN to fail

mvoss
Level 1
Level 1

‎07-15-2008 01:18 PM - edited ‎02-21-2020 03:49 PM

Can someone tell me how applying "ip nat outside" to int f0/1 causes the VPN to fail? The VPN is from 192.168.103.0 network on a remote site to the 10.5.1.0 network on int f0/0. Should I be using IP NAT Service? config is attached

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5220
Level 4
Level 4

‎07-15-2008 09:31 PM

Hi,

The reason is this: you redirect the ISAKMP port (UDP 500)

ip nat inside source static udp 172.16.3.200 500 wan.wan.wan.248 500 extendable

Change the port on the NAT statement and keep UDP 500 clear for VPN.

Please rate if this helped.

Regards,

Daniel

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