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之前发过一个帖子有关Telus, Shaw 的比较,
# X4 X! q1 z/ k. U3 o( f2 k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。3 @- ?! c# k, M& u+ \$ t: r2 x
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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. 5 r# {) o. F4 m b. ~$ G! B
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The Blocked ports currently are:6 L* V( B4 _/ B$ h8 T% R4 k
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TCP 21 (ftp): r2 ]) h; l) b7 _( k
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./ B Q& T! V$ K$ P. I1 S4 F) M
" v8 W! V6 }5 X# ?2 U: {- [TCP 25 (smtp)
- P& {$ Y% z ECustomers 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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TCP 80 (www)
& ^5 z; a( f/ Z- B6 x0 b. OCustomers 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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& V9 \ s8 Y8 ~( I' X2 v6 TTCP 110 (pop3)+ s& k ?; y8 A0 L; o+ ^
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./ N; o0 o2 z' E5 f: _/ z" s
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TCP 6667 (ircd)* H! [1 i) Q) d+ d
Customers 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 m7 ~& i; }) I0 l; W7 i
These ports are commonly exploited by worm viruses:
2 B0 L! s1 u, a+ c135 Windows RPC
& Y3 w& X& c$ n! O' h* a3 S$ O x136 PROFILE Naming System (basically unused)2 o; E3 B- w- @6 @
137-139 Windows NetBios
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" k1 }& S8 ~! u; Q: S. pTCP/UDP 445 (ms-ds)! H2 s8 R% K7 G
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)1 O3 d. o' `5 `. V4 G( S
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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