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之前发过一个帖子有关Telus, Shaw 的比较, 8 t& f( i1 A! Z* o9 T/ Z
家用Telus 已经封锁了不少端口。 也随时不通知下说锁就锁, 非常讨厌。
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Does Telus block any ports? / P+ U" n" l1 g! X" k: a* h
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:" s- K5 q0 ~2 S
! g/ A5 D' c9 @/ l; y& a3 y& {TCP 21 (ftp)
6 y2 f% T1 x3 |1 G6 i( [2 E) R# iCustomers running an FTP server will no longer be able to have Internet users connect to their server. Many customers computers are used as FTP servers to store illegal files.
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TCP 25 (smtp)5 U, Y' q$ K! }/ I
Customers running a SMTP mail server will no longer be able to receive email requests. Also, Telus users will not be able to connect to non-Telus smtp servers on port 25. Prevent mail servers that operate as an open relay. Open relays are used without a customer?s knowledge to sends millions of pieces of Spam.
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TCP 80 (www)
: ^- N- A6 P9 C9 QCustomers running a Web server will no longer be able to have Internet users connect to their server. Common exploit on old Window IIS server and Linux boxes that are not properly patched.! g u( q$ H" w( u2 d
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TCP 110 (pop3)
% ?! y" W, K7 h9 _* Y0 H( SCustomers running a POP mail server will no longer be able to have Internet users connect to the server. Prevent mail servers that operate as an open relay. Open relays are used without a customer?s knowledge to sends millions of pieces of Spam.4 i& z5 P, \! S) c
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TCP 6667 (ircd)
" f( h5 V; o) F- ~0 j0 ?2 @: q* nCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)( E! ?+ M6 Q+ U/ L
These ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)5 z* M7 ~) @+ C2 I! a: w' E
137-139 Windows NetBios4 j H6 T& [1 q% ^
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TCP/UDP 445 (ms-ds)
) ^+ r0 p, [3 cMicrosoft Directory Services - Customers that allow legitimate Internet users access to their computers will loose this ability. This allows hackers to directly connect to a Windows based computer and gain total control over the OS.5 O+ ^8 g! ~) @; {& ]/ ~
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TCP/UDP 1433-1434 (ms-sql)0 x7 f2 M, y: ^$ D, A( l
Microsoft SQL server - Customer running an SQL server will no long be able to have Internet user connect to their server. There are several worm viruses that exploit holes in SQL server. |
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