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之前发过一个帖子有关Telus, Shaw 的比较, 4 }/ m+ p3 p9 i# E9 l* X2 d' d
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?
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) ^$ r4 `3 \9 k9 |The only packages with no blocked ports at this time are the Server packages.
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* L, p" @! M- f9 p: g% JThe Blocked ports currently are:% L: h* u& p: b, V8 l
5 t- _* L5 S: K) _TCP 21 (ftp)1 O* Q S; z# K2 c* T; S9 ]
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.$ q8 V+ a$ M/ B: T( |( Z. b) Y$ ?
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TCP 25 (smtp)
; T: c9 a( s, R5 L0 `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' R1 z- z! ~
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TCP 80 (www)- N& H8 T( X1 N& `6 }* L
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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5 u5 m5 Z/ O1 V8 m1 w' zTCP 110 (pop3)% I$ ~ \+ ^ t) U( ~
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.) w' q" H5 W9 T' V' A3 Q
/ ]9 s$ s8 r1 XTCP 6667 (ircd)% O( E5 u7 e! `6 \) \9 n
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.2 o8 i' x4 N& V% B' S. P1 G
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TCP/UDP 135-139 (dcom and netbios)7 m! g& l6 J. w% t4 s3 {7 n% V
These ports are commonly exploited by worm viruses:, L2 _; d* Q+ Y) A3 j$ t
135 Windows RPC7 {4 H, P A( Q. M
136 PROFILE Naming System (basically unused)
+ A- _" v( H6 A137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)' M R' W+ F3 j2 e+ \- f: V$ z
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)
6 l& [% c" \( \$ f- a* oMicrosoft 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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