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之前发过一个帖子有关Telus, Shaw 的比较,
1 g# t- W+ u- y- X/ h( L' S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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0 A) }6 K8 t' y* E4 G1 z" s! ADoes Telus block any ports?
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8 }, z! x0 D ]$ V& N! IThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp) R) I& v7 |6 y: |3 x/ |
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.' ]) z4 y* \. R2 @6 d9 H
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TCP 25 (smtp)/ X' ~* l9 E! U
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.+ E2 |% u- w0 l2 W
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TCP 80 (www)
/ y! W* w: r1 m7 t) y9 r& rCustomers 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.1 k; i. d. X) n& U3 Q
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TCP 110 (pop3)1 j2 A8 e+ E @& j' 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.$ I. x: W$ e n
. e$ p+ N+ l: J" h% YTCP 6667 (ircd)( a' h: f, j) d$ E# B
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.9 U) u& {/ I) E0 ~! ^$ Q
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TCP/UDP 135-139 (dcom and netbios)
% K4 s# k: \- N# S- [: cThese ports are commonly exploited by worm viruses:9 l, T$ I5 P( e: d% `
135 Windows RPC
. d C3 h( c' w( b- [136 PROFILE Naming System (basically unused): A( j5 m7 y1 `( K" J
137-139 Windows NetBios& _5 R! w0 l3 K8 ]) z' t
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TCP/UDP 445 (ms-ds)
' H; W) r! j( L; [( e& B! S% I3 }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.# p3 f1 F/ N1 c9 X; u( ?# I/ U
6 Q+ k! C3 \3 O) x2 Q0 oTCP/UDP 1433-1434 (ms-sql)
9 p* x% K$ n. r) e$ ~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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