Warning – this post was original created by Jason Dixon some yrs ago, its copyright is fully held by samag.com. I copied it here for a track record, If there’s any issue, please let me know. As the pictures in this post had lost already, it’s suggested to check its PDF version here.
Firewalls are a required component in commercial and residential computer networks. For many installations, the firewall is a single point of failure between client systems and external resources. It can also become a liability when hardware or applications fail, leaving potential customers unable to reach your servers. » Read more: Failover Firewalls with OpenBSD and CARP