VPN on ASA...after connection, no bytes transmitted or received?

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Jul 8th, 2008
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Hey all,

I set up a regular IPsec VPN connection into my work.

THe problem is once i am connected, i cant get to anything on our network. I look at the session on the ASA and no bytes are transmitted or received.

I am sure this is something small...any ideas?


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nomair_83 Tue, 07/08/2008 - 10:21
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You mean..no bytes at show crypto ipsec sa?

If yes then enable nat traversal and sysopt permit connection ipsec.


accesshollywood2 Tue, 07/08/2008 - 11:09
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oh wait...it is enabled.. im sorry.. i had a brain freeze for a minute... but.. i dont see SYSOPT permit connection ipsec

a.alekseev Tue, 07/08/2008 - 15:24
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try to add this

crypto isakmp ipsec-over-tcp port 10000

group-policy himgvpn attributes

ipsec-udp enable

crypto isakmp nat-traversal

accesshollywood2 Tue, 07/08/2008 - 15:28
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I will do.. can you tell me what this does?

sorry i am still learning this stuff.. seems really complicated at times :)


nomair_83 Wed, 07/09/2008 - 03:42
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Just add crypto isakmp nat traversal 10.


accesshollywood2 Wed, 07/09/2008 - 05:40
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I am getting bytes received on the ASA, but none transmitted... i think we are getting close...!!!!!!!!!!!!!

a.alekseev Wed, 07/09/2008 - 05:33
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crypto isakmp ipsec-over-tcp port 10000 (IPSec over TCP, Cisco's proprietary, by default uses TCP port 10000)

ipsec-udp enable (IPSec over UDP, Cisco's proprietary, force the other side, if it supports, do IPSec over UDP, by default uses UDP port 10000)

crypto isakmp nat-traversal (NAT-T, RFC standard, take preference over "ipsec-udp enable". If both peers support NAT-T and NAT was detected in isakmp phase MM3/MM4, they will use IPSec over UDP with port 4500)


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