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之前发过一个帖子有关Telus, Shaw 的比较, ! G6 s0 ? Q* O- v! w4 L1 S
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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( f5 U2 e. }; iDoes Telus block any ports?
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1 W' @% q. m A2 ?. t( ^ K' h6 b- N lThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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" A. Y5 @; ^. R( J5 g y. Q. V- FTCP 21 (ftp)
6 r1 t; s0 J9 f1 \ W: u" v! l( a4 gCustomers 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)" M: N4 b) p# H9 @7 L: S& [
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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( _2 K# @2 I; }# p2 J9 eTCP 80 (www)# S2 H" ?- ~- }5 [5 C$ h/ v
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)( r u( Q9 h0 `4 m) D8 v
Customers 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.
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! Z6 J$ ^& @ u: Q' c! JTCP 6667 (ircd)
6 n4 ~* `9 S* g& \4 l5 n; Z( eCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.: o. g2 |4 p3 H8 m
6 G! m$ l( S. v) n6 vTCP/UDP 135-139 (dcom and netbios)6 D. E$ {% E7 l/ V, ?. {
These ports are commonly exploited by worm viruses:6 S D' [% {& g
135 Windows RPC
5 u: E6 N5 W. W% U136 PROFILE Naming System (basically unused)
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4 C8 W# k; [ m% s9 C- oTCP/UDP 445 (ms-ds)* s. W& o7 K F3 ?9 J- B: D3 Y0 Y
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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TCP/UDP 1433-1434 (ms-sql)
" B4 F* o0 J& b9 E2 [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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