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之前发过一个帖子有关Telus, Shaw 的比较, 1 c' C" i6 t6 ^+ |: z
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。0 X4 e+ e! N* y1 M
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Does Telus block any ports? 4 H$ G Y' |+ f& O) @4 ^
! F. ~. i" S: o) hThe only packages with no blocked ports at this time are the Server packages.
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0 k. _/ f; A+ A) K( C4 m7 hThe Blocked ports currently are:- x% e, f; z8 h3 H$ o
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TCP 21 (ftp)
- D# w s( a2 k$ ^5 [* YCustomers 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 f$ Z; J) `* @# n8 A6 e
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." P$ [' H) M. j5 @7 v1 w% j- L; s8 i, t
, R: H! m' H1 V, B- p4 ETCP 80 (www)
! ]7 D0 D3 w: [" ECustomers 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)+ g0 ~* G. v% Y0 z* x
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.6 }2 V% i) D! ?' K5 q
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TCP 6667 (ircd)
6 ]4 `' v6 _3 X6 a( `Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server." C# N j4 @/ U a1 v* q. G
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TCP/UDP 135-139 (dcom and netbios)( V# @/ G* i3 N2 X; g6 Z; _; ?
These ports are commonly exploited by worm viruses:! |( @/ @0 s! S, V
135 Windows RPC2 L4 [) j6 w8 K. D
136 PROFILE Naming System (basically unused)
! r6 y0 N8 G- w3 o) j, ]% V8 f) y137-139 Windows NetBios6 H$ v; t/ B( m* K" j
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TCP/UDP 445 (ms-ds)
3 O* `; L5 _/ ], B7 X. YMicrosoft 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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' W1 F& Q9 v q8 R0 ^9 q( MTCP/UDP 1433-1434 (ms-sql)
+ Z! F% l' x- @, NMicrosoft 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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