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之前发过一个帖子有关Telus, Shaw 的比较, 7 E5 X% O: ] y' D9 K" ]) 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。/ @! S1 |7 P% x m( r1 g
" r3 k" H: A& [0 g+ A* k9 BDoes Telus block any ports?
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1 A' _+ P& s E1 I( }5 Y6 qThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:- @+ c( M4 C5 P' Q$ P$ s1 W
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TCP 21 (ftp): c8 l/ z' s+ o) q) ~
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.' ]1 w/ R$ S5 W( A( C1 z) _+ w/ i
# a7 r, K7 k9 x3 V# _TCP 25 (smtp)' O& W0 b* {- I! u6 x" U9 |
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)# a' p7 J5 ?3 s1 J0 t4 }
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.1 O: ^3 g% l% z2 o* d
; `5 x4 c1 ^( p- ^* ?8 xTCP 110 (pop3)
% |1 _9 w g5 O9 J/ tCustomers 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.: d/ u# J" Q" C7 `
' `" N/ r' d& V/ d( FTCP 6667 (ircd)
9 c5 t- H. x) g0 K' ^: i6 Q2 S9 kCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)
! S( f0 ~7 ^+ H" w! U# sThese ports are commonly exploited by worm viruses:
0 b9 k# O% j. U' e' u7 u+ a135 Windows RPC; Z; F0 s% d+ C% t! s2 x
136 PROFILE Naming System (basically unused)
( N! _# N M/ m- L6 O137-139 Windows NetBios
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+ l0 ?8 M! w3 o4 [6 X# ~TCP/UDP 445 (ms-ds)' k1 p$ X4 D* Y% |7 U
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.2 X& F2 I1 v7 p: h0 h" g3 q j7 |
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TCP/UDP 1433-1434 (ms-sql)* `0 a8 i* ]& j6 t
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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