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之前发过一个帖子有关Telus, Shaw 的比较, # _5 _$ e, H8 m. P- n" x' t' i! b% u
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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7 d8 d2 _( h; E0 JDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages.
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% _. @* i9 H% s2 bThe Blocked ports currently are:: Y' O) k5 @+ l$ s. C0 J
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TCP 21 (ftp)
/ p& q* g' {* ~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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+ x% H. C& b# ZTCP 25 (smtp)/ p3 e! J: {7 v( z
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)2 s, Y. P) |2 d3 }6 M- 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.& b$ G8 b" |8 a+ s: i
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TCP 110 (pop3)# e9 Y, I; u( K- A( }, M
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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TCP 6667 (ircd). c6 Z6 M1 e$ ?( h
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.3 P0 E0 [" k& D4 q; I
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TCP/UDP 135-139 (dcom and netbios)! T1 e) f$ z* ~4 j& R W
These ports are commonly exploited by worm viruses:1 y4 k1 t7 O; f
135 Windows RPC
# f! Q/ d) i; Q. S; z$ r136 PROFILE Naming System (basically unused)
3 a( B3 B( z8 A, K( V& c137-139 Windows NetBios
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+ G N- G8 r5 kTCP/UDP 445 (ms-ds)
! I8 ]! x( `3 o" yMicrosoft 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)
+ i1 m6 n. d2 HMicrosoft 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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