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之前发过一个帖子有关Telus, Shaw 的比较, ! j5 m" r! R; } J7 i! X$ x" W& x
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.
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The Blocked ports currently are:' n& P$ I6 f* ]# p8 K+ N6 d
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TCP 21 (ftp)6 u3 x0 _) M( c# }; K( x, F0 w
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.# P( T6 `) R6 C1 V$ ^8 r
9 M# Z7 |, b3 |: Q- l& RTCP 25 (smtp)
5 W+ ]3 o5 s6 v( X2 HCustomers 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.- X- Y5 a8 L" }3 l$ y
& `- g2 @+ q6 `2 U- x$ s6 R Q% ~TCP 80 (www)
$ y" |9 W! Z3 TCustomers 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)" {4 L6 A: g! N% L$ L5 _
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.5 A) S: Q3 l* O$ G1 f7 b
/ m7 {2 O1 b7 @TCP 6667 (ircd)
2 e: r' ^. B7 T( g' MCustomers 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 b \! K% H" I2 Q# U0 Q$ JTCP/UDP 135-139 (dcom and netbios): a9 ~4 ?; m) v
These ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)
, v. X0 e6 y5 k137-139 Windows NetBios
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8 v8 u* ^5 Z0 D0 j4 X+ z- jTCP/UDP 445 (ms-ds)2 i; w2 s5 Q# ?; _
Microsoft 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)
. k, i# ~: z: UMicrosoft 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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