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之前发过一个帖子有关Telus, Shaw 的比较，
; z+ P- d! v! T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。: U' ^, a6 Z- B/ Q0 g
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Does Telus block any ports? - D+ {) g% @0 [. c5 R8 Y
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The only packages with no blocked ports at this time are the Server packages. $ W6 q0 D5 ^3 q* d
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The Blocked ports currently are:3 f7 S# F2 v: O* v9 d) r
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TCP 21 (ftp)! @# r' _" w6 K3 H
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./ j9 u# `. J8 B5 Y0 @, }
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TCP 25 (smtp)
+ _+ C9 |4 J$ m# ~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.
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TCP 80 (www)! h& O8 I: b0 W) _
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.) j S a) j* [" L; y7 e' `
8 }, _7 F# n2 s9 U# }TCP 110 (pop3)! I# a% t( L9 v8 M4 [( o; i( b# K6 F
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." b. B" } F2 S/ l! b
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TCP 6667 (ircd)
! B" T1 ]! @9 v7 b* nCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.7 s, t6 o# z. K; ?
3 o V0 R6 _' t" ~1 U, w, JTCP/UDP 135-139 (dcom and netbios) Y) s, ?% a, T+ { h
These ports are commonly exploited by worm viruses:
' n9 g) h+ p5 t# h; ~135 Windows RPC, Q! Z4 [( U$ U+ e* @3 [/ R! s: j
136 PROFILE Naming System (basically unused)
" A1 V, _+ u/ e6 |& g' A9 B137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
5 L7 F) P) D* O% K$ RMicrosoft 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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( r. _6 g) R. o8 s/ [* ~, {TCP/UDP 1433-1434 (ms-sql)
, E- V0 @7 C( o* N! q y: n, mMicrosoft 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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发表于 2009-11-7 17:58
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