connection problems with multiple servers, (ex: mumble and apache)

connection problems with multiple servers, (ex: mumble and apache)

On my server, i have multiple servers such as Apache, ftp, mumble,
counterstrike 1.6. Everything has been working fine until about 2 months
ago, a friend says that he cant connect at all to my server with his
browser or mumble (but counterstrike seems to work). He tried with his
computer and his phone. On mumble, he seems the Root channel and nothing
more, not even himself. In the browser, everything times out. Pinging,
tracert, and CS1.6 works though. After a while we thought we just leave it
as his ISP's (time warner i believe) fault because we didnt know what else
to do.
However recently, another friend has has the exact same issue, so it cant
be ISP because this friend's ISP is FiOS. we tried iperf and it seems to
work both ways.
Also, i THINK this is related, the second friend was testing FTP
connectiosn and gets this message from filezilla when trying to traverse
directories
Status: Directory listing successful
Status: Retrieving directory listing...
Command: CWD Music
Response: 250 OK. Current directory is /Music
Command: PWD
Response: 257 "/Music" is your current location
Command: PASV
Response: 227 Entering Passive Mode (98,119,77,23,96,137).
Command: MLSD
Response: 150 Accepted data connection
Error: Connection timed out
Error: Failed to retrieve directory listing