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之前发过一个帖子有关Telus, Shaw 的比较,
( U" b. J) G% S! V; ]9 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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~6 A$ g* C+ \2 o' VDoes Telus block any ports? $ M5 | L; P9 X' `6 h
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp)5 _9 Q4 G( {) w. V& k# l
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)! q: v+ T3 f$ p1 j1 E" S! R
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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$ g& I2 _( e. e) {) JTCP 80 (www)1 p9 T& j+ I# v1 h+ c0 W6 g b
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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TCP 110 (pop3)
1 |% ]# j- c" r( _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)
& U' X& T, Q2 i# P9 G" c8 LCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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1 O9 P; C7 C, h7 P; KTCP/UDP 135-139 (dcom and netbios)& w2 B" B% a; K# D
These ports are commonly exploited by worm viruses:
: e! b% S) }6 T1 O: O* y135 Windows RPC
1 [ U% f9 ?/ z( e8 q136 PROFILE Naming System (basically unused)
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TCP/UDP 445 (ms-ds)
, |+ U: C* Y* Y8 qMicrosoft 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)5 g) w8 a9 i. \' V
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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