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之前发过一个帖子有关Telus, Shaw 的比较,
. D8 F0 Q9 X8 u! _/ k% h1 K" G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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I4 Y# {4 P/ p3 D/ @: PDoes 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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The Blocked ports currently are:
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TCP 21 (ftp)- Q6 r7 D" l ~( C
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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, R+ t6 s, y E! |TCP 25 (smtp): f) w8 X- g+ f, @$ ~
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." w' C# [) \$ s$ I' Y" |6 K
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TCP 80 (www)2 I- t0 Y0 B; g" i4 @5 p; F
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 i8 J9 j) H, D# D) G. GTCP 110 (pop3)
* m" C0 g0 K- g) ~5 U2 J: hCustomers 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)
2 `) N8 y0 y* \. U4 e+ \8 ICustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)
6 z7 J( |: @* rThese ports are commonly exploited by worm viruses:2 g& K4 I' @( |, l* ?! b4 g1 n
135 Windows RPC
' m. Q- c5 c" v6 y3 N7 l4 t$ M136 PROFILE Naming System (basically unused)& Q! }; e& O5 S; p
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
7 O/ J# E6 F, ^$ FMicrosoft 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)
' z3 l0 T& \: f, S! u8 L: pMicrosoft 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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