I am using a client computer, my server runs Win2008 server, and I am granted all privileges to be an administrator of my own computer :rolleyes: The admin blocked some ports in the server so that I can't access to particular chat system or webpages. I would like to know if there is any way/method I can follow to trace out what ports have been blocked from my client computer.
You don't say why you want to know this, but if you really want to know they ask your administrator.
Note, blocking ports and blocking webpages are two completely different things. Most administrators don't block specific ports, but rather everything is blocked by default and they only enable those that are needed. Most administrators would see this as standard procedure in order to keep their server secure.
Blocking webpages is not about keeping a server secure, but is usually done to stop employees/users from wasting time on the internet or accessing illegal websites (eg porn on a school computer) and such action is usually as a result of a request from management rather than IT. Not always, as some administrators might decide to block, for example, youtube if users were downloading so many videos that it was causing problems for people using the internet for proper business use.
Blocking websites is occasionally done by blocking everything and then allowing only a specific number of sites, but it is more common for everything to be enabled by default except for specific sites. (eg if employees are spending too much time on Facebook, then social websites are often blocked).