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之前发过一个帖子有关Telus, Shaw 的比较,
1 Q0 b1 F# p& f1 \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。. \) O" w5 w5 e
1 b3 m' O$ |! ~. |& i0 yDoes Telus block any ports?
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" `2 C! l) d6 e9 E1 vThe only packages with no blocked ports at this time are the Server packages.
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( m& l- C% W2 R( F; F9 M7 VThe Blocked ports currently are:
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- Z& D7 B6 V H" R" n2 M6 DTCP 21 (ftp): B9 X8 z3 s9 q' y
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.
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TCP 25 (smtp)
! {" m' G: Q% ^% e/ o5 R) q% y* O$ ?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.2 E4 l& t0 }8 s/ a5 Z
6 z# T W q1 i$ x4 OTCP 80 (www)
: P0 p/ S8 x4 l" Y$ NCustomers 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.$ f' y% ?6 M, {4 W( u7 t! X
* X0 {. L9 n7 _9 c+ xTCP 110 (pop3)5 s$ E, a; g( J& I
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.4 K0 k% {( l% Y$ }- L, Q: }2 {
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TCP 6667 (ircd)9 {( o* K4 z3 E, K8 h$ ] M
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.4 f& g% ]# h( I7 O& l& q
9 a- N5 w, Q. J w: U: NTCP/UDP 135-139 (dcom and netbios)- l! d1 @& o/ }/ \( M
These ports are commonly exploited by worm viruses:
4 Q3 S8 L5 h' w) @8 q/ O; q135 Windows RPC3 g' t. M! U& Z4 l2 c0 h% {) z: i
136 PROFILE Naming System (basically unused)
! B& H* g% ?0 ~: g137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)' k5 i: J! j( @' \8 E6 I
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)
& Y4 d. B; n! s3 ^. 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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