VPN Client 5.01 Ports

VPN Client 5.01 Ports
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Subject Author Date
VPN Client 5.01 Ports rg 04-16-2008
Posted by rg on April 16, 2008, 5:26 pm
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What client protocol/ports outbound/inbound should be open for ipsec vpn
client to make successfull connection?

Thanks in advance


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Posted by News Reader on April 16, 2008, 5:48 pm
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rg wrote:
> What client protocol/ports outbound/inbound should be open for ipsec vpn
> client to make successfull connection?
>
> Thanks in advance
>

ISAKMP is udp port 500. You can use keyword "isakmp" in your ACLs.

If you use the client from behind a NAT firewall using UDP encapsulation
(port 4500), use can use keyword "non500-isakmp" in your ACLs.

If you are connecting to a PIX, I think you have the option of using TCP
encapsulation through NAT (port 10000?, configurable?).

ESP is IP protocol 50. Use keyword "esp" in your ACLs instead of "ip".

Best Regards,
News Reader

Posted by CK on April 17, 2008, 3:19 am
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Ports Needed for PPTP VPN
- TCP Port 1723
- UDP Port 500

Ports Needed for L2TP VPN
- TCP Port 1701
- UDP Port 500

Ports Needed for IPSec/ESP
- UDP Port 500
-50 for Encapsulation Header (ESP)
-port 51 for Authentication Header (AH).


Posted by News Reader on April 17, 2008, 10:40 am
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CK wrote:
> Ports Needed for PPTP VPN
> - TCP Port 1723
> - UDP Port 500
>
> Ports Needed for L2TP VPN
> - TCP Port 1701
> - UDP Port 500
>
> Ports Needed for IPSec/ESP
> - UDP Port 500
> -50 for Encapsulation Header (ESP)

Not port, "ip protocol" 50

> -port 51 for Authentication Header (AH).
>

not port 51, "ip protocol" 51

Best Regards,
News Reader

Posted by artie lange on April 17, 2008, 11:06 am
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News Reader wrote:
> CK wrote:
>> Ports Needed for PPTP VPN
>> - TCP Port 1723
>> - UDP Port 500

PPTP uses TCP/1723 and IP 47

http://compnetworking.about.com/od/vpn/l/bl012101a11.htm

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