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之前发过一个帖子有关Telus, Shaw 的比较, 5 N( A: [3 u6 j- D' f. v
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. 4 |! k: s& J; s! |" m
& g, r; N5 q9 e: j* H" ^The Blocked ports currently are:; a3 S1 v" d- K
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TCP 21 (ftp)% Y E" Q" b+ \4 v, L* i) e; f
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)! F4 F. e% s; I& G
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.3 Q& i! u2 t/ ^6 G& |
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TCP 80 (www)% Z& Z1 v2 A+ V1 E
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. [: v1 h5 g- [9 l
" ^' K6 s0 T( t0 vTCP 110 (pop3)" Y% R6 {1 A7 a5 K7 l, ^
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.% g% N& ]8 ^$ R1 d. J
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TCP 6667 (ircd)
+ ?$ D0 d2 w S8 M. o9 G8 Y" C7 m) DCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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/ }6 t0 U0 Z, i) c& M. U( ]- @TCP/UDP 135-139 (dcom and netbios); S" d0 h6 ?) [1 m: K" U
These ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)
+ m& m# b5 }. v, p137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
- i# V8 ?1 y# q( KMicrosoft 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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4 q& t; r8 a& h4 j/ G: {. F4 F2 BTCP/UDP 1433-1434 (ms-sql)
# M& Y4 Z7 _# R2 o' Y4 i" JMicrosoft 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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