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之前发过一个帖子有关Telus, Shaw 的比较, ( Z9 Q6 _0 F U, n+ e
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。$ D# m1 M& |% z* H5 F
* E1 G5 l4 v( v7 _Does Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. ; W$ o* E5 X5 r- q0 T/ s
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The Blocked ports currently are:
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TCP 21 (ftp)
3 y* i0 X' B% {( T, K& GCustomers 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)4 C( N, A$ }3 `( ~5 @7 ?3 e" M
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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TCP 80 (www)
/ D+ Q H' ^* \- F0 ]+ A5 OCustomers 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.) f: i1 |7 [4 K; s2 ~6 o
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TCP 110 (pop3)
; k4 N d t5 qCustomers 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.6 Y& j( g. Y. ^3 i
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TCP 6667 (ircd)" d5 ]5 y! o- k8 m; L
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.3 P4 ]3 c! @' S
4 e# q8 K& u2 J" V' r' ? h4 q& a/ dTCP/UDP 135-139 (dcom and netbios)# {7 ^0 Q9 G5 p. R1 h+ }+ n
These ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)' L7 \4 u' {" u0 I, U
137-139 Windows NetBios7 b( r+ C4 ^- S0 L
# [% d+ z# P# O8 E+ cTCP/UDP 445 (ms-ds)
9 H$ \; m6 ~, m, N. @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)
+ F4 E6 s. H2 p& ^" l0 A6 w9 qMicrosoft 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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