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之前发过一个帖子有关Telus, Shaw 的比较,
' [# h' H5 p4 ^# Q* K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。; _$ f* |3 w( v4 W
$ S1 T4 y7 Z' c3 P* tDoes Telus block any ports? % Z6 i$ {1 ~4 _; D
4 O; n8 x+ D+ I$ Q1 P! ?The only packages with no blocked ports at this time are the Server packages. 2 D# b1 c* W2 E1 O- G
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The Blocked ports currently are:, W+ i. L( q/ j `5 [2 Q
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TCP 21 (ftp)
$ z2 _) G$ k+ K+ ^+ w1 i. J5 cCustomers 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.3 ~ s% `" V4 _; F/ _
; L6 P' m$ }$ J/ O I4 `$ XTCP 25 (smtp)
. `. y% ^, l/ p* l- j$ \' K+ @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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! b% m8 E# k6 A% F, r& E) _TCP 80 (www)+ w) X( V | X. x5 s% ?* h
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.4 w* B* H' V/ H2 j' \& U& ?7 ~
( x% Q6 ?0 x0 K' }TCP 110 (pop3)
R" r1 B" s! B" dCustomers 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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0 a& f( p" t4 y( o+ KTCP 6667 (ircd)
% A v, k: i- Y1 gCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.4 T8 s0 [. @ w1 D! [
2 U& b- }! r0 R; ~' |TCP/UDP 135-139 (dcom and netbios)
( U, C4 R8 A5 [8 D5 Q" xThese ports are commonly exploited by worm viruses:
v4 w$ y% P3 ~/ ]1 [135 Windows RPC0 n1 `6 n( t* \# w, ?
136 PROFILE Naming System (basically unused)
5 ^/ y5 k7 \9 c- c, _- X# K137-139 Windows NetBios
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/ J+ d2 J, G/ l7 V1 s+ sTCP/UDP 445 (ms-ds)
" {/ ?+ c: j& n2 z% R7 Z/ R0 UMicrosoft 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.5 m! |3 F' |! a
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TCP/UDP 1433-1434 (ms-sql)3 U( q# q* ~* a7 @2 ]/ B
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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