Windows

This article is a bit of a divergence for me, I recently had the need to scan an entire network for a particularly nasty Microsoft security vulnerability MS15-034 ↗. There are a few ways to check for this, the first is obvious, check what servers have IIS installed. However, this bug isn’t limited to IIS, rather anything using HTTP.sys and, of course, a HTTP server can be spun up on any port you want so we need to check for servers that have HTTP exposed on any port from 1-65535....

Introduction Fairly straight forward this time, you’ve configured your MTU/jumbo frames to be 9000 on your client and destination devices (say a laptop/desktop/server/san/nas) and on ALL your switching devices in between - you’ve done that right? ;) Testing So the next step is, we want to test if our new 9000 byte MTU is actually working and we can reap the benefits of a larger packet size (whether it’s on iSCSI, LAN, whatever) being of course a higher latency but also higher throughput....