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之前发过一个帖子有关Telus, Shaw 的比较, 4 V# b% ?. o# K1 L+ |5 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。
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Does Telus block any ports? 4 X% g. |) E0 s7 u/ _$ M
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The only packages with no blocked ports at this time are the Server packages. 3 L+ b P y2 z% u: `
3 P/ ^3 _9 N2 F* U. L% ?The Blocked ports currently are:2 l0 A/ V& [7 f+ y5 @0 D0 f) V+ W) J
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TCP 21 (ftp)
; i; Q g5 C1 G" v& ]" LCustomers 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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- P6 d" @- z. B- h* e5 m$ @TCP 25 (smtp)
! C8 I! V l* o* ECustomers 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. h- w$ L" h: m. `% X3 J% M o2 r
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TCP 80 (www)
! }2 q( k2 h! p0 m! P! oCustomers 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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TCP 110 (pop3)- h9 ^( h: ?5 ~+ \: i. H
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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: S: [* X$ _4 u$ E' W/ t, TTCP 6667 (ircd)
0 o8 M# B E0 O! g( e0 k% a& QCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.% e# r1 k' J, ^* J" c, N+ V$ ?
0 J7 W4 W. C1 y) z! `; p DTCP/UDP 135-139 (dcom and netbios)
% ^5 _5 X6 n1 ^7 Q/ u( t0 Q( AThese ports are commonly exploited by worm viruses:; }' {) Q0 |! {
135 Windows RPC- j x, H) a+ r% C
136 PROFILE Naming System (basically unused)
/ w2 V8 H- g# f# u2 R. x137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)7 H# R9 G$ n( Q8 c# F
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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) W5 r+ Y; Z7 B( t+ h! x! bTCP/UDP 1433-1434 (ms-sql)
5 C# y: c9 T. U/ y( o$ f! XMicrosoft 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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