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之前发过一个帖子有关Telus, Shaw 的比较, 0 G/ E; x& C9 h% ~9 L
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。8 e/ e- |% r) |) A
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Does Telus block any ports? 6 h( F( i) {5 `3 ~' P
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The only packages with no blocked ports at this time are the Server packages. ! m) s6 z5 r9 N; b; [$ Z0 w& p& Z
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The Blocked ports currently are:1 g! Q0 u3 _* a- ~# D; ~0 _& s
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TCP 21 (ftp)* A3 ^. c( Q: T7 G% ]$ {0 L2 a! }
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.+ M# Y0 S, l( y( z! h
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TCP 25 (smtp)
2 A9 ~, X j, ACustomers 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.1 D- k( E( n+ W
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TCP 80 (www)2 t& p/ i2 G4 U3 w# Z
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.( {7 g! U( { t% {
2 l0 g5 i% `( I( L! {( R8 YTCP 110 (pop3)6 V9 M' N# m- `" C
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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& L% n+ P. N- } D e# p4 \2 d2 Y/ E4 YTCP 6667 (ircd)
: c$ N3 ~) K% s+ C3 cCustomers 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)! M3 w$ h% u# x3 W1 _7 w b
These ports are commonly exploited by worm viruses:, G) ]" G( h2 L' ?0 I4 X d
135 Windows RPC6 m/ N! U7 J& V' U
136 PROFILE Naming System (basically unused)5 ?- R8 I5 o# m# v
137-139 Windows NetBios. e" q8 `* w. ]) ^# R- \' g$ u
8 G: i; |7 w/ g5 y: f- OTCP/UDP 445 (ms-ds)
3 s# P% w* ^/ [ P# |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.+ E, f [5 {# @: T; \, v! b) J
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TCP/UDP 1433-1434 (ms-sql)' i2 t# a s+ ?& `9 @
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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