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之前发过一个帖子有关Telus, Shaw 的比较, 8 L8 S& F3 P( ?3 Z% P/ W$ N
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。' ^# {) ?7 n/ ?8 D
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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. , k( U2 F3 z5 g z
5 q* ~$ V+ [$ f' ~* xThe Blocked ports currently are:
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TCP 21 (ftp)
3 L- }( S4 N5 F" y5 ~ KCustomers 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.# J5 n3 p- s! s% V/ A
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TCP 25 (smtp)0 |$ X! b( G% b9 e! D' 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.8 S6 v3 p% J2 u5 M+ u+ v
j/ X- S$ _8 N Z3 _0 nTCP 80 (www)2 p: c9 S7 y& M k
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)
3 F* N, T: ]9 a& J2 v, Y/ f. UCustomers 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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) j B! f1 [; Q, |! F R: T ITCP 6667 (ircd)
2 M& `' }# M2 Y% f 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)
' L' E+ C5 f! N8 ] k4 E& lThese ports are commonly exploited by worm viruses:
$ a% v0 w E3 P) |$ m: M* I135 Windows RPC
3 H* t0 e- c# o; C. p% o136 PROFILE Naming System (basically unused)
; I/ U: a1 ?. `) v. a/ B z5 b137-139 Windows NetBios5 R. M4 V* `# E! ]8 N
8 b& ^ E4 E, ZTCP/UDP 445 (ms-ds)
2 ?: o; [0 s! u! W; sMicrosoft 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.6 Y' R6 [) T. ~9 w9 u
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TCP/UDP 1433-1434 (ms-sql)
) l& q4 z: m3 L7 bMicrosoft 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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