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之前发过一个帖子有关Telus, Shaw 的比较, _. @9 Y; g9 h, g
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. 1 J) o0 Y3 l7 q- O+ `
( Z" @- l% O4 O! Z Y2 KThe Blocked ports currently are:! ?. k" u N1 A% g( p: g( k
/ V8 ~2 W) G. q7 x' ?( cTCP 21 (ftp)
# W. H7 ~4 t1 h$ DCustomers 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.% e" b8 J* ?* Y9 a
) J5 k( v0 P+ T- I* UTCP 25 (smtp)
' p/ E8 p7 E! N" RCustomers 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.# l! v/ j+ o0 z: l% [
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TCP 80 (www)
4 Y5 k0 y- r/ [, S1 g3 ~0 kCustomers 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.1 ~/ I8 `, Z: c O+ x5 Q. R4 G
- J4 q$ i) L) B: |7 |TCP 110 (pop3)
& ]' [2 G; q. j+ OCustomers 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.' D$ T+ c% n9 [# ^ Z
4 }3 \8 W1 A& e* gTCP 6667 (ircd)
7 X8 D, Z- H1 h' b$ ?Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.+ |, I. @7 o+ _: v
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TCP/UDP 135-139 (dcom and netbios)" o- P( ]% U: }9 U0 C$ R
These ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)) v3 p( w' d5 B0 M+ Z
137-139 Windows NetBios P& I9 K L& C3 g
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TCP/UDP 445 (ms-ds)
8 Z# E4 ?" X( z5 ]% ?8 b. eMicrosoft 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)7 u6 N' D3 r! L: s
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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