Sometimes a software or web developer or web administrator or server admin, stuck with the problem they are facing. And you need help from the expert. So you need to paste your code for temporary, so the expert can help you find where the problem is. For network admin probably you need to see the client routing log or ping log, so you know why your client couldn’t connect to the server/network. You can use pastebin.com for this purpose.
Pastebin.com is a website where you can store text for a certain period of time. The website is mainly used by programmers to store pieces of sources code or configuration information, but anyone is more than welcome to paste any type of text. The idea behind the site is to make it more convenient for people to share large amounts of text online. Users have the ability to make private pastings, so they are only visible to the people they choose to share their links with.
Pastebin.com also have Firefox extension and Google Chrome extension for more user friendly.