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之前发过一个帖子有关Telus, Shaw 的比较,
7 E& N7 `( Y/ u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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2 E( E. W6 q0 T$ nDoes Telus block any ports?
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) p1 ?" k) U" C s) fThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:/ }) A+ n Z' T6 E6 E$ a
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TCP 21 (ftp)
4 v# i+ u% _5 T8 N9 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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5 a2 ]$ G0 N3 cTCP 25 (smtp)
- x: a( m3 L2 u5 OCustomers 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.& O& _" L4 `, B3 a5 J' T7 y
5 N; C1 H' {" l! WTCP 80 (www)
% k {/ A! k& v x9 `: w! w3 E! wCustomers 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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' \3 {4 y3 `; hTCP 110 (pop3)
9 L; H+ t& I; QCustomers 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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% B3 h3 x, W9 p; Y5 n9 [TCP 6667 (ircd)! u0 N6 g; M( }
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.& i7 g2 e9 g' r7 p3 ?( v; j
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TCP/UDP 135-139 (dcom and netbios); w* o/ v: s5 a4 U4 j/ w. I
These ports are commonly exploited by worm viruses:) z% f7 O! e4 R5 M! m# Z3 ^
135 Windows RPC
! @$ i7 y" W3 }* V: W% }; [0 e136 PROFILE Naming System (basically unused)3 W* x' D' s, D% J
137-139 Windows NetBios
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& H; m. u! N( s) l5 RTCP/UDP 445 (ms-ds)
v) d. Q2 L1 U9 z* k+ ~/ ^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.
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TCP/UDP 1433-1434 (ms-sql)3 s/ v2 C7 [1 s/ v+ e( f
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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