Novice - How can I tell if we are using IPSec on VPN?

whiteford · ‎02-19-2007

I'm a novice user, how can I tell if we are using PPTP/L2TP and IPSec?

I wonder if you know of a link, which simply explains the Stages of a VPN tunnel, phase 1 phase 2 etc? A lot of the googel searches go very deep for a novice user.

shyamatopsource · ‎02-19-2007

look at this link

http://www.ciscopress.com/articles/article.asp?p=24833&seqNum=6&rl=1

this gives you the basic knowledge on phase 1 and phase 2

Thanks

Shyam

shyamatopsource · ‎02-19-2007

When you are using commands like

fw1(config)# isakmp policy 10 encryption des

fw1(config)# isakmp policy 10 hash sha

fw1(config)# isakmp policy 10 authentication pre-share

fw1(config)# isakmp policy 10 group 1

fw1(config)# isakmp policy 10 lifetime 86400

for phase 1 vpn to define policies

you will know that we are usin ipsec

Thanks

shyam

whiteford · ‎02-19-2007

I use a Cisco Concentrator 3015, don't really use commands. The VPN connects to Cisco 837's for Lan-2-Lan's. On the router I see this sort of config:

crypto isakmp policy 1

encr 3des

hash md5

authentication pre-share

group 2

crypto isakmp key password address 1.2.3.4

!

crypto ipsec transform-set vo_t_set esp-3des esp-md5-hmac

!

crypto map vo_t_set 10 ipsec-isakmp

set peer 1.2.3.4

set transform-set vo_t_set

match address 101

shyamatopsource · ‎02-19-2007

Yes, thats ipsec