This is a problem I've been having for a few years now.
It seems when I run a 'refresh all' on a server browser in nearly any game with a high amount of internet servers (TF2, Dayz Standalone, L4D2, etc.) the browser returns really high pings (+200 ms).
After the refresh, I can select a server geographically close to me and refresh the one entity and it goes from a 250ms to 50ms ping.
The next step, I start a continual ping to my router before running the 'refresh all'. Router ping starts off 18ms and once the 'refresh all' starts it jumps to 200ms-600ms ping. After the 'refresh all' finishes, it goes back down to 18ms.
So my guess is, it's the amount of connections the router is trying to make which overloads the max udp/tcp connections. Which may cause the router to freak out but in all honesty, I really have no idea.
Pertinent information :
Internet Connection : Comcast 35down/15up
Router : Linksys WRT54g with DD-WRT firmware installed (Can give versions/revisions if needed)
Anyway, what do ya'll think? And how should I go about fixing this?
Edit: If you need more information let me know =)