Tag: Networking

FieldNote: Scanned firewall, found TCP ports open: 25, 80, 443

One time, I had a phone call from the ISP for the company I was working at and they said they did a firewall scan without notifying us. Ok, thanks for that, but next time, be honest and let us know when you are going to perform a penetration test and we’ll be happy to

Controlling bandwidth in a DAG reseed

Q: Is there a way to control bandwidth within a DAG (Database Availability Group) during a reseed process? A: No. However, that’s not the complete story. The question comes up when engineers need to reseed a database (DB). And while there is no native option to control bandwidth, there is a work around. Scenario: One of the

Load balancer design options

As I visit companies, I run into many that are doing different designs when it comes to leveraging load balancers. I’m not a network engineer and there is just way too much information to present in one article, but here are some thoughts at a high level design I’d like to share. TCP ports 80/443. In Exchange 2013, we