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之前发过一个帖子有关Telus, Shaw 的比较,
9 M% a5 w' v$ a1 x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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H7 E! @4 s9 e' P9 m: d. |7 ]; XDoes Telus block any ports?
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" d& x6 V9 w% T8 b) I6 i, UThe only packages with no blocked ports at this time are the Server packages.
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2 a- [6 S, `& C% W8 b& K h. \: bThe Blocked ports currently are:2 z f# g- r0 j o# b
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TCP 21 (ftp)9 P* }% ]( T8 D2 T. Y1 Z
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)7 V3 }5 |3 s" c, _3 f* `1 X K. X
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.( n- }9 E" z Z2 H" K
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TCP 80 (www)
: L* o2 K6 o( ?8 [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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9 \& N- t% z/ cTCP 110 (pop3)' X7 b1 T; p. Q6 g/ X2 P
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 O* n/ Q2 ~. y* {
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TCP 6667 (ircd)4 \$ U3 b/ h) s2 ^
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.0 D+ E, J4 l( s. Z+ r8 }6 A; H, n
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TCP/UDP 135-139 (dcom and netbios)9 `- Z% ?( }/ m
These ports are commonly exploited by worm viruses:
" }; w4 O; B( w# u135 Windows RPC
* G% J& P4 z. D136 PROFILE Naming System (basically unused)
k% C/ f/ w% O" [# |137-139 Windows NetBios
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6 M, q# {9 g9 vTCP/UDP 445 (ms-ds)
5 f m! Y3 F5 H* D6 E% IMicrosoft 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.% }% n( [! ?9 N) Q
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TCP/UDP 1433-1434 (ms-sql); u4 K5 t2 p# W( e. o# c+ q
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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