Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
Community Member

VPN connection not decrypting packets

I am trying to connect to a remote site with the latest VPN Client software. I can get connected but my end does not decrypt or receive any packets.

Host site: 501 Pix

Remote site: 501 Pix

Here is a copy of my config:

PIX Version 6.3(4)

interface ethernet0 auto

interface ethernet1 100full

nameif ethernet0 outside security0

nameif ethernet1 inside security100

enable password xxxx

passwd xxxx

hostname Pix


clock timezone CST -6

clock summer-time CDT recurring

fixup protocol dns maximum-length 512

fixup protocol ftp 21

fixup protocol h323 h225 1720

fixup protocol h323 ras 1718-1719

fixup protocol http 80

fixup protocol rsh 514

fixup protocol rtsp 554

fixup protocol sip 5060

fixup protocol sip udp 5060

fixup protocol skinny 2000

fixup protocol smtp 25

fixup protocol sqlnet 1521

fixup protocol tftp 69


name 172.xx.x.5 Server

name 172.xx.x.10 Nobleview

name 172.xx.x.2 WRT54G

pager lines 24

mtu outside 1500

mtu inside 1500

ip address outside

ip address inside 172.xx.x.1

ip audit info action alarm

ip audit attack action alarm

pdm location 172.xx.x.0 inside

pdm logging informational 100

pdm history enable

arp timeout 14400

global (outside) 1 interface

nat (inside) 1 0 0

route outside 1

timeout xlate 0:05:00

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00

timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00

timeout uauth 0:05:00 absolute

aaa-server TACACS+ protocol tacacs+

aaa-server TACACS+ max-failed-attempts 3

aaa-server TACACS+ deadtime 10

aaa-server RADIUS protocol radius

aaa-server RADIUS max-failed-attempts 3

aaa-server RADIUS deadtime 10

aaa-server LOCAL protocol local

http server enable

http 172.xx.x.0 inside

no snmp-server location

no snmp-server contact

snmp-server community public

no snmp-server enable traps

tftp-server inside Nobleview c:

floodguard enable

telnet 172.xx.x.x inside

telnet timeout 5

ssh timeout 5

console timeout 0

terminal width 80


Re: VPN connection not decrypting packets

on the remote vpn configured pix, verify whether the nat traversal has been enabled.


isakmp nat traversal 20

Community Member

Re: VPN connection not decrypting packets

I have added the line isakmp nat-traversal 20 and still not getting any decrypted packets on my end. I have attached a screen capture of the statistics window.



Re: VPN connection not decrypting packets

please post the vpn server pix config.

CreatePlease to create content