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之前发过一个帖子有关Telus, Shaw 的比较, + R: Z! g: C g( b8 c4 P, J! F B
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 c1 p: G) L7 C4 [% TDoes Telus block any ports?
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: P. A9 r8 p& @4 h- c8 @3 x7 sThe only packages with no blocked ports at this time are the Server packages. / R* i- ^' |# t9 r5 g5 R
9 Q2 q2 A6 e! v: v, aThe Blocked ports currently are:( ], `- k C" O( b/ a
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TCP 21 (ftp)
( h* F6 q( ]6 t/ f" |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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. T. q6 e7 |$ d/ W R+ zTCP 25 (smtp)2 o/ e t) b* N( C8 k; G; P% J
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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1 P# `# w+ o& d$ oTCP 80 (www)+ M* |% Q* x+ w$ S3 I: Q, T6 q4 W
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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0 V8 Z/ s5 K8 b9 n0 QTCP 110 (pop3)
: b+ Y2 X+ c U; O9 ICustomers 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.# S+ H0 @+ Y# A: r- E
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TCP 6667 (ircd)& d& y; R$ L4 D6 L! e, e6 J% 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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( _4 o* Z, H- z# p6 lTCP/UDP 135-139 (dcom and netbios)
0 R- X1 ~4 r3 S/ OThese ports are commonly exploited by worm viruses:1 Z% U! ^/ j9 e' C; v4 X
135 Windows RPC( l1 e: l9 N: X6 A) `, _. M- F
136 PROFILE Naming System (basically unused)0 _1 q4 D% ^' A, E
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
' [( ~$ y: B; f$ E' h0 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.5 z9 ^+ V/ o/ b" M3 n& X* B% L$ v
" j1 Z1 Y ] [4 wTCP/UDP 1433-1434 (ms-sql)( |- V5 |; W1 G R. 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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