I hate IT managers, how on earth some become ant form of manager is beyond myself.

I have a server with a hardware firewall. A client, based in the UK, with French offices is saying the server blocking their new French IP. I white-listed their IP address, still no luck.

That was a week ago.

After 4 international phone calls and nearly 30 emails I resolved the "issue".

Their so called "IT Manager" sent over the wrong IP. Instead of it starting with 46.* he sent over an IP starting 42.*, which was in fact being correctly blocked.

Suffice to say I charged the client a lot of money for the wasted time and international rate calls.