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之前发过一个帖子有关Telus, Shaw 的比较,
; A F) A& N7 N8 S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。5 p$ R9 e6 I# T
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Does Telus block any ports?
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9 N( {1 y' |4 L9 q. g( C/ _$ K7 WThe only packages with no blocked ports at this time are the Server packages. 2 \: n$ s: R3 ?
7 ?' O2 j- m4 X8 m# Y. l) cThe Blocked ports currently are:
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TCP 21 (ftp)
/ B! D/ E! M9 y5 N4 A7 N7 l4 G$ 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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$ ?% S( a' h4 ^$ dTCP 25 (smtp)8 X! p4 i/ ~* i" o' X* S
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.4 t+ Q8 q- C" s# [1 Q2 t0 t
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TCP 80 (www)
. N+ X" H1 ~" k' [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.9 u* m; ?5 L3 S: `) G
& w7 k2 q( C& c% e( g# v/ DTCP 110 (pop3)
) B8 g6 q) W4 L, b& N4 p, FCustomers 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.: H: T: [. U0 N: O: T) s: q8 e
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TCP 6667 (ircd). x, r" M0 E' Z- i" K) K# H
Customers 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! a% }( l1 V0 E4 W/ D0 SThese ports are commonly exploited by worm viruses:
! s7 X, u g# D. _" }# l% L6 d7 I135 Windows RPC/ }: i2 t, N! p1 c
136 PROFILE Naming System (basically unused)
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TCP/UDP 445 (ms-ds)
% F9 s% q+ F4 T9 m9 o: R+ K4 e$ eMicrosoft 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.& a1 d A& J- n" q J
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TCP/UDP 1433-1434 (ms-sql)+ F' K0 }7 V4 \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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