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之前发过一个帖子有关Telus, Shaw 的比较, ' p. N/ z4 ~6 [1 t8 [( _
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。6 W5 _# ] ]4 n" X
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Does Telus block any ports? 8 e& ~9 v$ d# R6 G/ G4 T
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The only packages with no blocked ports at this time are the Server packages.
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- h$ W8 O( c% }; T9 L! ]" E) yThe Blocked ports currently are:6 Y4 v1 J, Y4 `0 D$ N
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TCP 21 (ftp)* a5 n- O& i( ^3 S! X
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.- I" L+ V8 u% R( s& U2 Q
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TCP 25 (smtp)
/ [3 ~8 f, D- g1 U6 n- i* ~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.1 E' v. Y7 D6 d# S6 _! j
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TCP 80 (www)
6 J) j) Q7 ~3 U! @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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& A6 ^! O; a3 O" fTCP 110 (pop3)
) `( L- N& k) o) C* W/ j/ H: 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)+ {; l) n) c& x/ f0 _) W
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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* ?4 j* z4 w! G; S: aTCP/UDP 135-139 (dcom and netbios)9 M9 d# p" J! [
These ports are commonly exploited by worm viruses:
( Z I: r% R. C+ x' s' `135 Windows RPC: k" `$ ]+ U* M! t1 Y. n
136 PROFILE Naming System (basically unused)
6 ]+ x% \, R% }8 S! x- y3 T137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)+ r1 Z# S1 n* 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.$ F6 X) R b9 G1 k; ^
1 \& R9 C7 ]! r, |* F& YTCP/UDP 1433-1434 (ms-sql)5 A2 d c# ^4 Z+ u) V* _
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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