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之前发过一个帖子有关Telus, Shaw 的比较,
. q1 e' a4 R: A1 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。. K6 ?! A* p$ a1 Y' H4 M/ F
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Does Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages.
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, F. \$ V K6 N/ q5 lThe Blocked ports currently are:. S; b/ V [$ ^$ ?
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TCP 21 (ftp)
) e* J- n" D+ w) u/ J1 ~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.3 S; E& Z: A; U
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TCP 25 (smtp); ^; B- C( {9 M6 K) G4 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.1 K8 G8 {9 d K: k+ n; y
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TCP 80 (www)1 P1 p: ]5 O/ W" h4 }5 n& S- ^9 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.
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TCP 110 (pop3)( U: T: w! y9 Y- O* {9 q
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)
& \7 B7 ~5 P& z( S, Q) D- Q! t N2 ZCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.* y+ G2 x4 Y2 [/ N9 f
! Y( {) \* ~/ O' ~4 kTCP/UDP 135-139 (dcom and netbios)
# d, Z9 i ]% k* Q; t0 O; c. d* RThese ports are commonly exploited by worm viruses:
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136 PROFILE Naming System (basically unused)
# f( a# G, Q/ ]137-139 Windows NetBios! l( B. J4 J- u5 U' o
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TCP/UDP 445 (ms-ds)) G5 }- Q3 T, G1 E3 e4 h
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 ]; R$ e8 c( [( ?* g/ e9 H$ e- Y
f. V2 L9 d- iTCP/UDP 1433-1434 (ms-sql)
) O4 i7 K0 O% @. C8 Z& W' U, `9 X5 ^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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