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之前发过一个帖子有关Telus, Shaw 的比较, ' O: s/ A: R! }+ b0 k% Y/ w
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? ' T" p, t3 Y- S
$ S5 i5 }5 h) S) A9 p! O2 M6 YThe only packages with no blocked ports at this time are the Server packages. 0 k" g7 s+ H1 r$ t- x0 \' G4 U
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The Blocked ports currently are:
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) w7 ^& E! o: r, KTCP 21 (ftp). p5 A9 {. _5 |3 B; ]: L
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)
# e5 ], j* O# v$ D S1 h+ G2 RCustomers 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)
& T' t- |; d; \- D: _( x% |1 RCustomers 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)9 C; ?/ L- |; j+ R' [
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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+ k' B& b8 C, ZTCP 6667 (ircd)
4 U# F# h$ [, f2 r' lCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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, o% q5 d$ w7 |1 f+ A: W3 ITCP/UDP 135-139 (dcom and netbios)% I: X; `( N% {3 y* C9 N7 [
These ports are commonly exploited by worm viruses:
1 N3 a3 U, ]* r6 K- }135 Windows RPC
* \5 \2 M, _. m8 Y136 PROFILE Naming System (basically unused)
1 B& ]6 ~, \& e m, \; x137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
& M& M: C3 G4 G8 \" M* PMicrosoft 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.% |. K: E; G" o0 b3 W! N
& g! J: m. S e9 iTCP/UDP 1433-1434 (ms-sql)
3 H, R; u1 r/ F, \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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