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之前发过一个帖子有关Telus, Shaw 的比较,
( J8 Q% {! v" `" Z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。$ u0 x+ e! H1 R* p
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Does Telus block any ports?
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o/ f: h9 E, H/ j& l/ G j% h7 |The only packages with no blocked ports at this time are the Server packages. & ~' a& }) B: S8 W$ t
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The Blocked ports currently are:
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TCP 21 (ftp)
* v7 ~$ X+ v9 Y) ^$ z @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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TCP 25 (smtp)' g: s# z4 `* A- ?/ c1 k$ N
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)$ i$ P4 e, f; U2 B: L% v# n
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.5 W$ R- Z# w6 k2 u3 t
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TCP 110 (pop3)! b# F( K0 ? ~+ c! O1 C
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.8 c, G, }& Z9 `+ m4 Q
+ j ~# v3 F+ ~1 @TCP 6667 (ircd)
9 b5 W- n R1 f7 \5 \" zCustomers 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). j6 n% {& ~: @, }* I! p, p& ?& X
These ports are commonly exploited by worm viruses:* j/ c; Z T: d# M% Y5 k
135 Windows RPC# k$ k& O2 i: }6 a" z
136 PROFILE Naming System (basically unused)! v' J2 f* M- A. d) J3 Z! b3 y; Y
137-139 Windows NetBios% S6 T1 U+ j4 g$ P* P5 S- W1 \0 \5 C' G
$ R4 u; q$ w: K1 ~7 N2 nTCP/UDP 445 (ms-ds)! N0 |; a! f; Z0 i
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.3 ^' Y: M- Y$ T; y8 ~! q
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TCP/UDP 1433-1434 (ms-sql)
5 w0 ^7 C7 P, E* X+ N: q$ [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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