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之前发过一个帖子有关Telus, Shaw 的比较, ' {, O/ v* `0 y
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。' j( W8 k8 K- j; P
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Does Telus block any ports? ' P/ }) Q I- x0 S- a
1 ~" J y9 p$ n. ]The only packages with no blocked ports at this time are the Server packages. $ q/ x f* ^0 X# O4 ? E
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The Blocked ports currently are:( w" g6 y) T0 i* M Z* d
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TCP 21 (ftp) N& L6 O" ^- E& }0 a8 u, n
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.$ b8 L8 a+ E) y+ O9 V% `
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TCP 25 (smtp)2 U2 P: }1 z$ M/ m6 N- T2 [" A
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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3 D) h0 v+ o3 g7 B3 }7 [TCP 80 (www)# S C( m0 f K0 Y5 q
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.
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TCP 110 (pop3)
+ R; J5 J2 p! G( f# N) vCustomers 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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8 u( R& I" @9 ^1 QTCP 6667 (ircd)
) y/ F# j0 |& _6 s! j7 PCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.& m* i2 s/ m- B" @7 O; W
& A, S6 V" y% i0 t- HTCP/UDP 135-139 (dcom and netbios)
0 F, r/ L- g, Q+ {These ports are commonly exploited by worm viruses:/ _! F7 K; p M2 J4 p
135 Windows RPC
. _8 B# C9 i! `. _! s" j136 PROFILE Naming System (basically unused)5 x( E3 y( v* {* D0 S# L) a3 e0 ^/ |% i
137-139 Windows NetBios/ w- ~! T5 G: O T/ L
$ a9 l9 w6 m# h* ?TCP/UDP 445 (ms-ds)
2 z4 i" Y$ @; f* I |* T- iMicrosoft 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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; T( L8 A+ _1 O0 J2 TTCP/UDP 1433-1434 (ms-sql)
; \" m( G$ n5 s1 T' TMicrosoft 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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