Hi, we have a service that only implement's ldap authentication.
would like to use radius. Is there a method to allow bridging from
ldap to radius?
If I understand you correctly, you want Radius to use LDAP for
authentication. If so, then yes: that is possible. Have a look at
Freeradius which has an LDAP driver that (at least several years ago)
worked flawlessly against OpenLDAP. There may be other Radius servers
with similar capabilities.