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之前发过一个帖子有关Telus, Shaw 的比较, 2 p* F3 S; T+ C9 T9 {5 w7 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。* | ~4 e, Y$ r1 Q3 {$ a
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Does Telus block any ports? 7 y) }: j" \2 ^/ X4 E5 w5 P9 j
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The only packages with no blocked ports at this time are the Server packages.
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7 C3 U2 Z. O) h& ?# h: K0 G bThe Blocked ports currently are:
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TCP 21 (ftp)
- h. y* l( ?* P; \) N7 m; sCustomers 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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. g* C: j6 C/ i) ^TCP 25 (smtp)( E8 r% |4 a6 P% j) f) V" g/ 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.
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% h8 s0 y/ ]' }TCP 80 (www), x `/ k2 q0 F) Z) T
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)
9 F' T; @; ^( F! v) a. _$ h+ f6 gCustomers 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)
1 W7 z4 M/ }" V+ [! MCustomers 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)
" Q, M# Z& j* l$ `7 tThese ports are commonly exploited by worm viruses:
1 ]9 m, t7 p0 k. T! y- S1 ~, R135 Windows RPC/ A8 q8 P6 T& c2 L) r( K
136 PROFILE Naming System (basically unused)
2 E, {$ }2 G- H137-139 Windows NetBios
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7 b. y3 | ^) ZTCP/UDP 445 (ms-ds)
* M6 Y9 E" l9 U, z( 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.& y: i2 f2 X# q2 H# K) |) `
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TCP/UDP 1433-1434 (ms-sql)
. Y6 I) V2 c/ S- hMicrosoft 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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