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之前发过一个帖子有关Telus, Shaw 的比较, / ^( I+ |$ `/ V3 _8 Z
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。- l& \' ?7 Q* m( W9 m, M
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Does Telus block any ports? 8 _" @% g) V3 O" a0 V
7 C! o7 F V" w# k0 d/ wThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp)
. P7 ], ], G3 {5 Y, n6 k( OCustomers 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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TCP 25 (smtp)
, B2 P/ B' f! B3 B" W- v4 w$ V- `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)
( F8 p0 u N/ y- P- i/ N3 t! h0 qCustomers 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.; Z! B) u2 x& `+ L2 {. p' b# h
% y8 G5 L. O" b* t! M9 I! c9 Y' gTCP 110 (pop3)! b7 E' G+ U& n2 v* J1 g- z% E3 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.
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4 b6 S2 j. `8 P0 z' L; U8 c. ITCP 6667 (ircd)
! R5 ~- g% J. k3 S7 gCustomers 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)
# W$ b( d5 J+ u5 wThese ports are commonly exploited by worm viruses:0 v" n/ T6 _+ I
135 Windows RPC
2 O/ H, w& S% G; d3 ~136 PROFILE Naming System (basically unused)
5 M7 \) N+ O1 m. [2 R/ K$ I* \137-139 Windows NetBios
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; U% @/ x0 |' F! K5 _( f- q, hTCP/UDP 445 (ms-ds)2 X2 R% Z% b+ ~* {9 g3 k6 W
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.4 t: ^- Q% J) p! j3 H% Z
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TCP/UDP 1433-1434 (ms-sql)* B% O! S- y( l8 H
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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