Can not connect to a specific ftp address from a specific location

For some reason, from开发者_运维问答 my office I can't connect to specific ftp address. I can connect to it, from elsewhere, like my home. I can connect to it via http and ping. I access dozens of sites via ftp on a daily basis, so it's something about this site from my location. How do I go about determining what the problem is?

It may be my ISP or ever my local router, or what else?

It sounds like something in your office is filtering the connection.

If I had to guess, they are preventing outbound FTP connections out of misguided security concerns.