網絡問題 20點 急急急急急

我到左呢個網去測試網絡
http://netalyzr.icsi.berkeley.edu/
紅色表代網絡有問題
測試後 我有兩個格有紅色
想問下點解同有咩解決問題
最近連線有d差
(Reachability Tests)

Direct TCP connections to remote FTP servers (port 21) failed.
This is commonly due to how a NAT or firewall handles FTP traffic, as FTP causes unique problems when developing NATs and firewalls.

Direct TCP connections to remote BitTorrent servers (port 6881) succeed, but do not receive the expected content.
The client received an empty response instead of our normal banner. This suggests that a firewall, proxy, or filter initially allowed the connection and then terminated it, either because it did not understand our server's reply or decided to block the service.


另外封包遺失率都有3% 有咩解決方法?
20點