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之前发过一个帖子有关Telus, Shaw 的比较, 0 K! w/ o0 \7 c3 [; ]: O! p
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。- r, m- @1 S' `+ s1 \
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Does Telus block any ports?
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6 O- l5 [0 o& ^$ u9 `2 J* UThe only packages with no blocked ports at this time are the Server packages. 0 G q9 W! j0 {
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The Blocked ports currently are:1 w1 z# [ o' e5 J
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TCP 21 (ftp)
, f ~' L5 l% B/ ~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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4 K, G9 i. u/ A8 k3 DTCP 25 (smtp)
" ?) S7 R/ O) H, a0 T4 f# {& v$ LCustomers 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.9 E# v) M( F0 N3 C7 B, W% Y
) E) j: i/ _: O* Z9 H& dTCP 80 (www)0 E8 R, Q; L l/ C
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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4 g7 U8 }; t& ?; w) q" R+ ~TCP 110 (pop3). Y; P& G' `, m: w: X. k
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) q5 |% c7 B2 UTCP 6667 (ircd)* L! A0 B4 |: E
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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( }1 m# R* E6 eTCP/UDP 135-139 (dcom and netbios)* N$ A2 @% o1 Q3 Z
These ports are commonly exploited by worm viruses:
$ m B4 T1 a" U135 Windows RPC
7 h/ P% @4 M7 ?0 ]5 ~4 R136 PROFILE Naming System (basically unused)) A% O$ P) x1 o
137-139 Windows NetBios; v1 E/ p3 Z3 f6 \5 U. J* n, D6 p
A2 j, X2 x: @) UTCP/UDP 445 (ms-ds)
$ X% `+ r8 A* v& xMicrosoft 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)( k; Z* z2 b4 l; G; B2 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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