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之前发过一个帖子有关Telus, Shaw 的比较, 3 k: M$ b5 }, @- K+ E& ~' u' 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。2 s/ L a( e/ C8 R
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Does Telus block any ports? 5 N, o. `. T) ^. f& B
% x: p7 w$ p' o0 {+ P2 wThe only packages with no blocked ports at this time are the Server packages. : t; m, W+ r j. |
1 _0 S6 E) A2 W9 E9 D3 sThe Blocked ports currently are: @8 \% s" e) n- {# R. Q' C
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TCP 21 (ftp)$ @8 v% _' o8 Q
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)
: \; h; o' i2 n' kCustomers 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.0 `* p( x6 f+ T
4 M# k( B1 ]* OTCP 80 (www)* ~% |0 C G, {
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." d: }; u6 @/ r. q# B
3 ^( u3 q b2 j* m3 VTCP 110 (pop3)" l: y; Z$ F& l; J- [7 u
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.: w1 R- @( ^8 `) X. {
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TCP 6667 (ircd)
5 e1 g4 e% w7 g- T |* Z: Y3 QCustomers 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)" w* A) x; w, p0 ^
These ports are commonly exploited by worm viruses:! f( j( D3 @( e' a$ v7 k+ s
135 Windows RPC/ X3 t1 E( V5 V. ^ P5 h( k
136 PROFILE Naming System (basically unused)
) X) r- H+ }5 ^7 C* y. Z137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
5 ^1 Q, p. S: ~ LMicrosoft 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)% A% G7 R8 d% }8 d. \" o6 j& l3 a3 B
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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