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之前发过一个帖子有关Telus, Shaw 的比较, * ^2 J3 T1 `2 S- 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。) v" Z9 {& R9 E- e+ K3 O& Q
2 P4 T* k) D N& ^) @Does Telus block any ports? a0 [9 d: L' D) y0 q
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The only packages with no blocked ports at this time are the Server packages. 5 ?- G& b I8 A( h; o/ O
Y+ g4 S2 _* wThe Blocked ports currently are:2 P) |; @3 U7 r1 u9 Y
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TCP 21 (ftp)( y' |6 i* }8 o6 n3 @* N& _( q1 v
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)
, A. o2 @ @: X( W+ `- ]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.* n) B! P& M1 @: O6 z5 ~
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TCP 80 (www)3 c J4 L/ g" I6 o, n3 [3 I
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)
: L$ v1 P& A, I- p3 [! ]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.; U5 b3 {* M( Y
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TCP 6667 (ircd)+ s' F1 H* ^$ R' L6 |
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.; o) \7 Z' Q7 f9 ]% N. v8 B, j# a
3 l- Z6 C; u, @% DTCP/UDP 135-139 (dcom and netbios)8 e$ ^) X U1 J) E8 p
These ports are commonly exploited by worm viruses:
5 }6 |/ e; ~. o135 Windows RPC
, V8 |: L( X7 M$ c5 P' {. @ t- A136 PROFILE Naming System (basically unused)
$ ?# c6 ], ?, k0 x |7 b5 T- m137-139 Windows NetBios
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b8 y4 w, w6 g, |9 u+ BTCP/UDP 445 (ms-ds)4 S$ A7 H. z6 C' K. h4 H# t
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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0 y0 X* j) c. M& ^7 p) Q# }TCP/UDP 1433-1434 (ms-sql)
9 d6 @; T1 E$ nMicrosoft 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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