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之前发过一个帖子有关Telus, Shaw 的比较, 1 }7 h6 j- L0 L" 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。
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3 W' T- `: U% h+ s' ^& E7 @; e# `- VDoes Telus block any ports? - h% N P4 u9 J# ?& S: z* K
# d; Z0 X2 P% ~2 TThe only packages with no blocked ports at this time are the Server packages. 9 n" q# c$ w9 H& Q4 r' S; g
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The Blocked ports currently are:
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TCP 21 (ftp)
0 {4 y9 R0 U& K( F: V% N0 g% ECustomers 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)2 l6 ]! }7 A# _3 `& ^
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.+ K6 r6 V- k# t; v
: a' f* n& Z6 p3 UTCP 80 (www)/ A* ?: V& N( o( }* v
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)1 y" T4 M) w( y! d
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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TCP 6667 (ircd)
: o/ m- m9 e, B/ f8 ^4 zCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.$ X; g5 H$ G& S* D0 q4 T
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TCP/UDP 135-139 (dcom and netbios)! P; p0 h }1 b6 R
These ports are commonly exploited by worm viruses:! Q+ M2 [8 R3 k- Z' e" Z4 _& z& R4 @
135 Windows RPC
8 g' n, L$ T2 O4 O& t8 \136 PROFILE Naming System (basically unused)0 ]7 r7 |1 u/ `% E7 N
137-139 Windows NetBios$ V- c1 @) Y3 f# L& [& F
% V8 z4 Z4 v( Z Q4 O! I, RTCP/UDP 445 (ms-ds)
$ H; F9 G% I0 F, J, qMicrosoft 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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; {0 o+ ?% I+ F' ]# |9 U2 f+ uTCP/UDP 1433-1434 (ms-sql), ~* ~7 z' `. P
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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