How to easily bring Cisco ASA back into failover.

We had two asa's that were never upgraded so I decided to upgrade them. However the failover was never turned off. If I copy the config off the one asa to the other and bring both back online will this take care of the issue or will I need to re-do the config on both the the primary unit and the secondary unit?

Hello,
1) First thing is to keep up to date with the Cisco vulnerabilities announcements to check whether your box is not compliant, etc.
Use Scanning tools like NMAP,ZEN-MAP, Veracode, etc.
Use Dictionary attacks to determie whether you can hack into the Device.
Etc,etc.
2) To audit the ASA well
Check the ACLs (make sure they are as specific as possible) Show run access-list
Make sure a failover cluster is in place (show failover)
Make sure traffic not desired is denied (packet-tracer tool)
Make sure you are sending logs to a syslog server for further audit stuff.( show run logging)
Check the Authentication ,Authorization and Accounting variables (show run aaa)
Etc
3) Change the ACLs to satisfy your needs. Being more specific is always more secure.
access-list outside_inside permit tcp any host 4.2.2.2
to
access-list outside_inside permit tcp any host 4.2.2.2 eq 80 (In the case of a HTTP server)
4) Always check release-notes and Cisco vulnerabilities announcements
Looking for some Networking Assistance?
Contact me directly at [email protected]
I will fix your problem ASAP.
Cheers,
Julio Carvajal Segura
http://laguiadelnetworking.com

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How to easily bring Cisco ASA back into failover.

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