We are all aware of the recent tampering of our beloved social networking site Facebook. Hopefully none of you were the unfortunate recipients of malicious activity, including: hardcore porn, grotesque human gore, and religious degradation as reported by The Christian Post, which was one of the first to cover the event. Current investigations point to malicious javascript created [...]
Blog Archive for the ‘Palo Alto’ Category
Misconceptions about Palo Alto Firewalls
Monday, October 17th, 2011Recently I had lunch with a network manager from a large community hospital. As we were discussing security and the Palo Alto Network (PAN) firewalls, I realized that many people view them as only application firewalls. After reviewing Palo Alto marketing materials, I believe part of that misconception is due to their focus on their [...]
TCP Split Handshake and How It Could Affect Your Firewall Configuration
Tuesday, April 26th, 2011For those of us who work in the security world, a recent attack called TCP Split Handshake has caused many of us to question what is considered secure and what best practices are. This attack circumvents a rudimentary firewall configuration called “established session” in which a firewall will permit a session that was initiated from [...]
The New Infrastructure, No Infrastructure
Monday, April 11th, 2011One of my clients asked me to replace their entire Infrastructure due to end of life. While investigating their needs, I realized that they had a complete Citrix XenDesktop environment and that their bandwidth needs were minimal. Although CrossRealms, Inc. is a boutique Infrastructure company, the question of whether this client needed a new Infrastructure [...]
Considerations for PoE Deployments in Switch Closets
Friday, March 25th, 2011As companies supplant digital handsets with IP phones, they deploy Power-over-Ethernet switches to support them. PoE switches generate almost five times more heat than data-only switches, however, heat that has to be taken into account in switch-closet design. There isn’t much written about how to deal with heat in these small spaces, a fact that [...]