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之前发过一个帖子有关Telus, Shaw 的比较, $ C* K+ q* y) ]6 X1 M- S, M
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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* j& j, ~+ _5 a( {Does Telus block any ports? 1 v; Y0 Q w" D+ J+ q8 ?5 ]
; y! ]# h$ h, R- A4 jThe only packages with no blocked ports at this time are the Server packages. 2 y' D( A7 K5 g$ ?6 @
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The Blocked ports currently are:
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. [0 I! D( b% e }0 dTCP 21 (ftp)* Q1 U+ x3 b( @! i
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)
4 Y- m$ [9 i# s4 F# E( mCustomers 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)
: L* w$ B! E1 H% A5 E) yCustomers 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)
( y3 Q, L6 x# P! `. RCustomers 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.- H: x: ?! E- r( f5 d' z; ?
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TCP 6667 (ircd)1 @9 \& O9 Y* G$ D5 O% k
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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# P" D* B; b5 B' K% W7 X) }TCP/UDP 135-139 (dcom and netbios)1 Y. e! P% t3 U" m8 h3 d2 l
These ports are commonly exploited by worm viruses:- {. L( l# F1 |5 T$ f- w
135 Windows RPC8 ?5 j X4 l g5 E, W f
136 PROFILE Naming System (basically unused). |6 S' l3 ~2 ^" h1 p, p- t8 o
137-139 Windows NetBios
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: A& C6 k: J1 b% F# UTCP/UDP 445 (ms-ds)
$ K2 S6 c" G; S* D& m# bMicrosoft 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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& P, x% p- w4 Y- y5 N+ Z" yTCP/UDP 1433-1434 (ms-sql)
) F( F g% T* L+ X8 dMicrosoft 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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