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之前发过一个帖子有关Telus, Shaw 的比较,
, {: X0 k- O$ P- j1 {' p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。2 f/ n3 [# T* W6 b
7 z) W; U$ F& r- ?% B. ]Does Telus block any ports?
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5 g$ @+ E% q4 G! l7 B% l2 _! rThe only packages with no blocked ports at this time are the Server packages.
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1 ?. e! S4 o T3 P4 fThe Blocked ports currently are:
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TCP 21 (ftp)
$ |: d8 h/ l. z7 P( Z6 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.5 ^ G. X9 Q* p5 n, K% b
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TCP 25 (smtp)" {- S7 a8 v: o
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)% R+ h: x6 X; Z, f4 R& K
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)8 Y* }3 {9 F) ]7 H ~ V
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.4 c/ c4 r% p- l; K
# c( z) ^. k. X; xTCP 6667 (ircd)
$ `5 Q# z( P. o Z+ zCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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6 a" b3 ~/ v3 m r! T v' yTCP/UDP 135-139 (dcom and netbios)3 j* c( x# @0 h
These ports are commonly exploited by worm viruses:
. a+ i* | B% q" x+ q# ?6 a135 Windows RPC
$ X; ~1 |1 K2 V6 [" f4 {136 PROFILE Naming System (basically unused)
6 g" Z* h2 X& B: p9 V137-139 Windows NetBios4 L1 Y6 K4 K q* g: [
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TCP/UDP 445 (ms-ds)9 V; h! R& c8 S/ Y
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.
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TCP/UDP 1433-1434 (ms-sql)
& j/ G. b5 O9 k; ?, E2 E' mMicrosoft 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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