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之前发过一个帖子有关Telus, Shaw 的比较, 0 f' k' Q& ?( p4 Y" `( S7 O3 r
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 o1 j3 F( X2 K9 U7 n
G r5 z7 K/ o$ g1 x6 l; c k7 fDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. 3 F# z M6 R9 r* b8 n* ~; B1 p
- X( u4 N% m5 m" P5 s( I/ o3 ^The Blocked ports currently are:
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" h [6 `2 N+ v6 p: F. _1 T7 `# u$ t! ?TCP 21 (ftp)
; F9 P9 q; Z3 T0 |; [" TCustomers 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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TCP 25 (smtp)4 U9 v; w, O2 y
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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9 G9 s, K e' \$ k9 A' xTCP 80 (www)/ \. \4 l$ o5 J3 ]+ H
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)
5 a, f5 B8 a; H- K% E* OCustomers 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.4 c: }9 x) h& p1 G* n" J
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TCP 6667 (ircd)% u g% [4 B3 @! | l
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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! c7 J. t/ m$ J( KTCP/UDP 135-139 (dcom and netbios); \$ U& E9 p3 s8 ~ c0 a3 Q
These ports are commonly exploited by worm viruses:
% i( `5 n4 [. P7 L G- {$ x# B5 k135 Windows RPC
0 j( Q. F( O" H& e: M9 I+ o136 PROFILE Naming System (basically unused)
% Z& w& [5 ?0 K2 ]! ^( L137-139 Windows NetBios7 f1 ]8 p. Y# t2 i; S, q
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TCP/UDP 445 (ms-ds)
* C( J1 C$ R% F; C4 t$ OMicrosoft 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.+ N" [8 t2 u0 j- p( C# F8 f
. z& j* R) |' V9 a) E/ MTCP/UDP 1433-1434 (ms-sql)
! ?% d3 z2 f- X b. S8 IMicrosoft 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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