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IPSEC VPN CONNECTION BETWEEN CISCO ROUTER 1921 and CYBEROAM

chrismtove
Level 1
Level 1

Hi Guys

I have been working on this cisco router to configure IPSEC VPN between cisco router 1921 and cyberoam 750i,configs are as attched on the documenst,unfortunately i cant ping between the device,tunnel cannot be established?

What will be wrong with the configs and what will be pocbo solution.help me out please?

Thanks in advance

 

 

1 Reply 1

Hi Chris,

 

I saw the VPN configuration on the router:

Phase 2:
crypto map TAAMAP 10 ipsec-isakmp
 set peer 41.59.251.110
 set security-association lifetime seconds 86400
 set transform-set TAASONGWE
 set pfs group2
 match address L2L
crypto ipsec transform-set TAASONGWE esp-3des esp-md5-hmac
ip access-list extended L2L
 permit ip 192.168.2.0 0.0.0.255 192.168.1.0 0.0.0.255
ip nat inside source list 100 interface GigabitEthernet0/1 overload
access-list 100 permit ip any any
access-list 100 permit ip 192.168.2.0 0.0.0.255 any
access-list 100 permit ip 192.168.10.0 0.0.0.255 any
Phase 1:
crypto isakmp policy 10
 encr 3des
 hash md5
 authentication pre-share
 group 2
crypto isakmp key taasongwe address 41.59.251.110

 

This is matching at phase 1 and phase 2 effectively. Make sure that on both sides it is using Main mode, not the quick mode. Also I noticed your NAT is not set up correctly, you are missing a NAT exempt:

 

ip nat inside source list 100 interface GigabitEthernet0/1 overload
access-list 100 deny ip 192.168.2.0 0.0.0.255 192.168.1.0 0.0.0.255
access-list 100 permit ip any any
access-list 100 permit ip 192.168.2.0 0.0.0.255 any
access-list 100 permit ip 192.168.10.0 0.0.0.255 any

 

After this take this output:

* Show crypto isakmp sa --> so we can see the status

* show crypto ipsec sa --> to see phase 2 if the SAs are formed

Also running debugs work:

* debug crypto condition peer <peer IP address>

* debug crypto isakmp 

* debug crypto ipsec

 

Please proceed to rate and mark as correct this if it helped you!

 

David Castro,

 

Regards,