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之前发过一个帖子有关Telus, Shaw 的比较,
$ F- F! t% u" T2 y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# \( l# V' k3 D; ^/ O) l
7 p8 w2 {+ z% ]% [4 j, rDoes Telus block any ports? 3 |9 t5 t9 I- E( [* I' g: T5 c
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The only packages with no blocked ports at this time are the Server packages.
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* `+ O) P8 D* R1 w1 uThe Blocked ports currently are:
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TCP 21 (ftp)) @" b3 z/ C2 e( T+ Y% s
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.) ^3 O v9 A( P7 i# M' }
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TCP 25 (smtp)2 X, Y( _" y# @. `
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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TCP 80 (www)
! ]6 {: ?3 C2 W# LCustomers 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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$ R% y& X! y6 o/ R5 ATCP 110 (pop3)4 N0 \, F5 O% j% T
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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$ |/ y# w5 w1 R1 I: D0 f9 E1 @TCP 6667 (ircd)# c5 Z+ y5 m2 \8 ~# A+ u( I
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.' a+ W' D* Q8 u# A7 {; l, ~; @
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TCP/UDP 135-139 (dcom and netbios). V' z+ u+ p% Q% u
These ports are commonly exploited by worm viruses:# y. K; a# k) g
135 Windows RPC$ R0 l$ q- @2 P, u
136 PROFILE Naming System (basically unused)6 E: O% r1 F. e- ]. o7 c
137-139 Windows NetBios
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8 B N* b& o. T) k; Y$ zTCP/UDP 445 (ms-ds)+ I; _( J3 v; F' q
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.# [$ c& }6 ?' q5 E. ]7 f
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TCP/UDP 1433-1434 (ms-sql)
, k0 D- F' O, r6 ~* J. y* zMicrosoft 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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