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之前发过一个帖子有关Telus, Shaw 的比较,
" u% i$ I! a1 o( r/ k" E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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% A+ [+ L+ B) D. k$ RDoes Telus block any ports? 7 ]( L0 d* k1 h1 x c3 V
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The only packages with no blocked ports at this time are the Server packages.
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5 C! h/ I1 q K4 @- rThe Blocked ports currently are:9 k( m$ r: m% \7 |
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TCP 21 (ftp)$ ~6 ^4 h! `! {' J/ {- Z; T- |
Customers 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.* F6 _( @$ j" D( s% j4 O$ k
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TCP 25 (smtp)7 a! J5 C& S! j% v: j$ 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); s( B4 V& ~0 U
Customers 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.
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TCP 110 (pop3)
) s# D, T% ^; ?0 tCustomers 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.0 E* Q! X" X4 B4 a: q4 p
& Q( K b% {4 {TCP 6667 (ircd)) k' A/ K1 e, E
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.- g, e) U2 P1 k9 w
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TCP/UDP 135-139 (dcom and netbios)
! `* N3 w; T; {' m. NThese ports are commonly exploited by worm viruses:
2 f! ?, b( F p, A& {135 Windows RPC
0 L7 T3 \3 g( D$ W136 PROFILE Naming System (basically unused)
% p/ p% W6 _7 |137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)3 t6 A. ~: l+ u- J
Microsoft 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.
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8 {5 B+ P9 ]- d; VTCP/UDP 1433-1434 (ms-sql)
$ O3 a k# K% ?) H$ K9 g% U3 z& `1 FMicrosoft 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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