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之前发过一个帖子有关Telus, Shaw 的比较,
. b. a7 ]+ D5 q2 U2 s3 _' Q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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+ v$ N$ r1 N8 N- x: d, A! t) XDoes Telus block any ports? 1 _) v$ V& a% C3 k
: ^+ H* O# [- jThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:2 J9 X! V2 X7 i/ x
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TCP 21 (ftp)
1 L/ P8 g z$ Y3 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.
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TCP 25 (smtp)! T" S- W. L; R# v7 F& ` I0 T) ?
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.5 {8 W9 f& S7 e; S. X, b
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TCP 80 (www)% F$ J3 n! ~4 k& S
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.' G+ B/ N3 f2 {1 v, x, A2 L
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TCP 110 (pop3)
' f" ?3 z6 D, P5 {: |1 {3 \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./ R: Y5 R9 \; q- v
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TCP 6667 (ircd)
. _7 q% s4 a+ {$ y4 s3 |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)
. ]2 Q. _3 S# cThese ports are commonly exploited by worm viruses:
+ C6 W# A& ?- Z135 Windows RPC
! P3 k/ G5 \& p136 PROFILE Naming System (basically unused)9 M& u* A8 J/ \
137-139 Windows NetBios
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- X" w$ ]5 t$ H* m4 M) s1 eTCP/UDP 445 (ms-ds)
: M+ J% q/ _- K6 DMicrosoft 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.% H# Y) w3 S% A9 r% a
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TCP/UDP 1433-1434 (ms-sql)8 C4 T; l7 @$ l8 G0 ? E. _
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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