In the course of my sysadmin/network administration duties, I need to packet sniff for connectivity issues. Unfortunately, this often occurs on machines I don't 'own'. Servers under the purview of other administrators, end users' home machines, or simply servers we'd like to avoid installing new software on. So I'd like something that can be used without a proper 'install'.
I personally use WireShark for my local desktop. Works great. But it obviously doesn't cut it for the above scenarios. I know they have U3 and portable apps versions, but that is dependent on physical access to plug in a USB stick. That's also not something I can count on.
So, does anyone know a packet sniffing tool that can be used without a true installation? Something that is just contained in a folder that can be dumped on a target machine, used, then easily deleted? If it's just a CLI, that's perfectly fine. I can always move the .cap files back to my desktop for analysis.
I would personally prefer something that was free (as in libre) and free (as in beer). However, proprietary and paid for products are perfectly valid suggestions.