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之前发过一个帖子有关Telus, Shaw 的比较, $ {6 v' w; q" ]) L9 @5 n* @/ G) z
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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The only packages with no blocked ports at this time are the Server packages. + [" t& y7 I, l
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The Blocked ports currently are:- g: J- n8 S9 N- _2 u0 W' e
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TCP 21 (ftp)
6 W0 g7 p, X# r$ |1 q/ Z; M7 gCustomers 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.- F' V! u# V" n; A, x9 |# B
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TCP 25 (smtp)
, R4 v5 W. n4 R# O6 d4 y/ 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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( M2 a. K# c k: G+ c5 h/ e! cTCP 80 (www)
" p& p: w1 B/ o4 L6 e! jCustomers 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)
! V) U+ ]* b0 fCustomers 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)
0 y. d* Z; m$ u% ECustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)
* t% L4 V& x4 W4 }( |; Y' d) TThese ports are commonly exploited by worm viruses:
4 G( A3 A& M) ~" s+ W135 Windows RPC' x+ J4 [/ A' T
136 PROFILE Naming System (basically unused)
: y& O% t$ L) L137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
, h9 q! w# h2 X! _' g% `. i9 UMicrosoft 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)
$ B/ D7 J5 J2 ]Microsoft 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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