ScreenOS Firewalls (NOT SRX)
ScreenOS Firewalls (NOT SRX)

Certificate based VPN with Cisco fails

03.22.10   |  
‎03-22-2010 07:48 AM
Hi all,
Hi all, 
Policy based VPN with Certificates to a Cisco IOS 12.3 Advanced Security Phase 1 error occurs: Cert received has a different FQDN SubAltName than expected.The cisco router has no SubAltName option in Certificate request so the certificate what I can install on that cannot contain this field. Please let me know how can I configure the SSG to ignore these fields. (the missing fields are IP and DNS name (both in SubAltName field)I've found the following article: This states that SSG only checks these parameters when FQDN peer ID is used. I use IP address not FQDN.I attach the debug ike output. If I cange the authentication to presahred key the VPN works.

Thanx in advance, Balázs


ScreenOS Firewalls (NOT SRX)

Re: Certificate based VPN with Cisco fails

03.25.10   |  
‎03-25-2010 01:08 AM

I found the solution at Cisco-certificate site.


1. Have to makle the Cert request on Cisco

2. Modify the Windows CA settings described here:

3. When adding the cert request to the CA add the two san attributes to the reqest.

4. Issue the cert, and auth will be fine Smiley Happy