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之前发过一个帖子有关Telus, Shaw 的比较, ' P7 U& a! z. \6 M: T, S
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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% d0 W+ G. U- x! E: }9 A, ?" D5 D6 QDoes Telus block any ports? 2 u1 y- a# x- R) [, ]! d' |( A; C6 n
5 I; I0 H# v; `" {/ H. t, @The only packages with no blocked ports at this time are the Server packages. 4 c- F s4 ?' b0 @' E
3 o9 z3 O8 F9 V4 N3 S( x6 B4 P( R/ AThe Blocked ports currently are:' V- A8 p" Q0 P8 H1 C2 N: f2 f
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TCP 21 (ftp)
3 L* {/ h) ^/ D7 @' }" sCustomers 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). M; @5 n4 z5 R' v) @/ j" L
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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* c) |4 f. \ j! m) yTCP 80 (www)
, E w6 W3 I( b9 PCustomers 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)) l0 _6 Z, [0 [3 y. ~
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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. \! m) w* S0 E) BTCP 6667 (ircd)& x* U3 Q) S' q
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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% H% m; j/ N' }9 _& A3 K% S0 Y( jTCP/UDP 135-139 (dcom and netbios)
! B w+ u% j9 ]These ports are commonly exploited by worm viruses:
5 Y2 q# p9 X' T4 m; H2 T# `) t135 Windows RPC2 l6 ^, v; a$ |5 H
136 PROFILE Naming System (basically unused)
) ?1 ]+ Z: ^ p! A- b k7 p137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
3 L- m, e" _) R0 yMicrosoft 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)% `- N4 {& O1 ~" x+ i) i
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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