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之前发过一个帖子有关Telus, Shaw 的比较,
8 D# s0 A {6 [5 Y, B( b+ T5 b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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$ O9 r6 E1 f, x1 N, r* ^Does Telus block any ports?
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( U- _1 I& ~6 ]) `$ W$ }- h( PThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:6 |& }, @; L# G
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TCP 21 (ftp)) c& _/ d! \6 S' u, v/ m
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.
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r" s! M! I: m6 U+ {- o. eTCP 25 (smtp)3 J) o% y, R: {- E8 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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! A& ]' {; G ?. @3 D" @TCP 80 (www)$ M# m/ A9 G1 v4 B
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)! f; Z d; {7 f+ @$ F
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.- Z( \9 q% v/ ~ o1 V5 l
8 P' `& r' ^" m% A" c8 ATCP 6667 (ircd)
7 W- N9 C z3 B+ T/ _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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/ m: [) y" @4 GTCP/UDP 135-139 (dcom and netbios)- b( X) R; E) {2 w; D# }
These ports are commonly exploited by worm viruses:
* w" m: t, x2 q# X1 p135 Windows RPC/ p6 z0 f8 ]" y
136 PROFILE Naming System (basically unused)( J( Z8 u; B, l5 I
137-139 Windows NetBios
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) w4 D' s# X! J1 F7 G/ W# M2 nTCP/UDP 445 (ms-ds)
+ i1 |3 F. U: z& tMicrosoft 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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; F/ X; y% n1 M0 ETCP/UDP 1433-1434 (ms-sql)- G. c2 q9 N6 k" j7 ?0 @% f- p' j
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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