[CA enrollment for ipsec ]

[Sri Siddhartha Kodali <siddhu@bits-pilani.ac.in>]

Respected Sir,

I am using a 7100 cisco based VPN router as my vpn(ipsec) gateway.
I would want to enroll the VPN gateways with a Certificate Authority
Server.I tried out few CA's but all of them support https protocol
for authentication and enrollment.but the 7100 vpn router supports
only http based protocol..Could you please suggest me some solution 
for this.

Thanking You
Yours sincerely
Siddharth Kodali
siddhu@bits-pilani.ac.in