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之前发过一个帖子有关Telus, Shaw 的比较,
+ v: \0 g( q0 t6 x% ]6 g* o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。; f8 L) r0 l) f: l2 B
/ J& t9 M6 z' E/ b& cDoes Telus block any ports? # V0 |% f- |9 U! U
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The only packages with no blocked ports at this time are the Server packages. 7 @: c; A6 b# s `
) b3 }- g) n- O, s/ C% j) e WThe Blocked ports currently are:
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: A$ e" g2 g% c6 m4 y- x: |TCP 21 (ftp)
: ]# ]" g9 j# D* @$ y# F, K3 dCustomers 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.) f$ t7 s; U1 Z7 G/ r5 y4 B" Q$ ~
! e) p- U+ `$ \TCP 25 (smtp)
5 ?& P0 C2 T7 b lCustomers 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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+ o/ T# B C: b/ }7 H- s# cTCP 80 (www)& E# @, x( e4 J' m4 J1 l
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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) l+ c' b2 h- oTCP 110 (pop3)
: F$ j' P% I0 n/ @6 CCustomers 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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7 J2 A" h* u# r0 V' P, @9 ?" tTCP 6667 (ircd)
+ U$ I7 s* z1 V: p$ uCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.- Z6 O* z! B9 p' a
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TCP/UDP 135-139 (dcom and netbios)
" F4 H. s* I4 }" QThese ports are commonly exploited by worm viruses:
6 y+ V2 {% f( B135 Windows RPC$ Y7 J& d2 H! B) b: K2 z) Y- I; g
136 PROFILE Naming System (basically unused)+ {7 I+ L: s7 m* l
137-139 Windows NetBios
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6 D& l2 c) a l5 CTCP/UDP 445 (ms-ds)
' S- p* @. F- x8 }0 FMicrosoft 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.& |3 E/ g/ Q" h
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TCP/UDP 1433-1434 (ms-sql)2 M1 v2 a. d+ i( c( J3 W
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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