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之前发过一个帖子有关Telus, Shaw 的比较, 6 Y, K% X7 J- p8 U5 Q
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。4 j' u! J2 N( }5 V6 D
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Does Telus block any ports?
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, L) G( S4 `4 s$ w+ T9 c9 xThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:; z% Y% Q5 n( T% P
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TCP 21 (ftp)
" W$ j+ n, S0 {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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9 }+ d" \% a+ R- ]( `& JTCP 25 (smtp)4 y0 P4 O/ Q& ]9 g
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. R) O/ a2 T1 X
+ [% `7 `: ~. e H+ p/ ?TCP 80 (www)0 ]9 M! |! C7 u4 B& p0 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.2 b; w0 C& C7 ^$ @7 P& Y \& ~
5 L0 W+ U; R: eTCP 110 (pop3)
- o0 Z5 @: F1 i3 f7 ~5 F. eCustomers 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.. d4 `1 H; {6 A) T5 x# c
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TCP 6667 (ircd)
: g# [; r7 |( j7 KCustomers 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), s; z |* g! X q* b, C% [
These ports are commonly exploited by worm viruses:
% X6 @9 t0 Y2 |135 Windows RPC
; A7 S! h1 m) K5 h) k8 m136 PROFILE Naming System (basically unused)
: }; @- W' m3 S137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)/ j# ]; X; L9 |4 ?; _! B
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)7 X! b7 v% X' l
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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