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之前发过一个帖子有关Telus, Shaw 的比较, ! \' |+ ^1 t W* M2 I, u+ O. v
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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# d7 W+ }2 Z( ^ iDoes Telus block any ports? 0 F+ ~2 ]( C, T1 Z) J- L
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The only packages with no blocked ports at this time are the Server packages. ! R4 ^) ]+ [( R/ b0 F y+ y
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The Blocked ports currently are:
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( D' J, E; q' K$ l1 y1 q+ `TCP 21 (ftp)
$ L) l! v& S) j- I! L, l6 @9 CCustomers 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.$ P0 J/ U$ M& q. G
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TCP 25 (smtp)
' O: `! ~3 d) K( K$ sCustomers 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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& b9 Q0 E+ }0 ~TCP 80 (www)& |+ Y& Z: x B
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.& n+ Q& b, g& \+ Q! q
4 z ]1 T; i% B3 wTCP 110 (pop3)" }( m! J d) q+ X/ }* b
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.1 K* A- b9 P+ v! i/ _
) ]+ ]# p+ P. sTCP 6667 (ircd)+ D5 U! J# G3 z; o+ Y3 R* D% 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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) p B! t$ f: CTCP/UDP 135-139 (dcom and netbios)
3 Z b# @( t) k- G1 `6 t# NThese ports are commonly exploited by worm viruses:
+ _+ _! M7 `6 X135 Windows RPC
) L! l5 j/ ?; E136 PROFILE Naming System (basically unused)
/ S0 Z+ r) X+ @; Z& f9 w- `0 f. W137-139 Windows NetBios* A0 g: |5 L/ v4 b) A
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TCP/UDP 445 (ms-ds)2 @9 F4 W$ Q; [8 A j- }" Y. L1 l
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)
8 q6 v8 l- L# I8 b. {: cMicrosoft 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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