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之前发过一个帖子有关Telus, Shaw 的比较, ' \/ }$ \! r/ _4 j
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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' c" p9 {' X: N. q& M4 m8 r! GDoes Telus block any ports? & W, u) p# b% T9 h" u6 V: L
! m# Y' v# D3 E" p' B3 P& \5 tThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp)2 v& S" K2 X6 ]
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.
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TCP 25 (smtp)
, W' Q4 i7 _3 z S- x+ C; l& `% XCustomers 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)
! V( A% l, D# k! P- @3 v& tCustomers 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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( S/ v: d4 T+ B0 ~% Y9 ITCP 110 (pop3)
* z1 W7 u! q( `: a" E/ ]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.9 J3 b: `, C2 Z1 {7 X
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TCP 6667 (ircd)1 I7 p4 [8 ?; R" S! s
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.3 y: F$ I/ D2 o( L/ k) l
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TCP/UDP 135-139 (dcom and netbios)
, o* t2 q; S: } r! JThese ports are commonly exploited by worm viruses:
& p5 M& J. o' m' D X' f135 Windows RPC: T. m, ?' [2 g& Q3 h0 w1 |+ j) r
136 PROFILE Naming System (basically unused)# m0 C1 n% q1 J4 R& Y
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
" J1 J) G. h; B. c, \3 `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.( [: n/ y, ~1 g" q
: x1 _' k$ a* L. n- XTCP/UDP 1433-1434 (ms-sql) _3 M1 ]8 t7 E3 v4 e! p
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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