[salawat]

Ah... Network hardware troubleshooting. Truly, it separates the frustration tolerant from the frustration intolerant. If not because of the challenge of having to take into account things mist programmer's treat as invisible, but because it usually involves at least one conversation with another network provider to check their stuff; which generally leads to the most passive aggressive dodging of blame until you get that one operator who's one goal in life is to keep the Internet running correctly.