Category Archives: Networking

802.1x autentication by certificate error in ISE

A customer coplains about users authentication error by 802.1x with certificate with the following error  in ISE live logs:

OpenSSLErrorMessage SSL alert: code=0x22E=558 ; source=local ; type=fatal ; message=”certificate unknown.ssl/statem/statem_srvr.c:3800 error:1417C086:SSL routines:tls_process_client_certificate:certificate verify failed [error=337100934 lib=20 func=380 reason=134]”

There is not much documentation about this error out there, this free radius mail thread points to certificate EKU as the problem. Since machine authentication by certificate was working properly on the customer, after do a certificate comparation and after some tests with the EKU properties, we solve the problem just removing the critical propertie from the EKU key.

Once configured as non critical the EKU propertie, the authentication for users by certifacate works properly, this behavior were found in IPHONES phone and AVAYA softphone, and probably to other devices and software which use OPENSSL libraries fore certificate validation.

Checkpoint: Remote access VPN users recive IP addresses which are allocated in ipassignment.conf

After adding IP addresses to $FWDIR/conf/ipassignment.conf you can observe in smartlog that the IP addresses are beign assigned to other users. If you face with this problem, you have to use different networks for Officemode and ipassignment.conf. You can do it by subnetting the Officemode address pool or by using different networks.

Once you have different networks configured, if Antispoofing is enabled for Internet interface, you must to add the network used in $FWDIR/conf/ipassignment.conf to the exceptions for Antipoofing for that interface.