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之前发过一个帖子有关Telus, Shaw 的比较, ! _% Z! c/ Z" t6 H# I# e5 n/ ~
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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" ^% `' Z; b' jDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. * t" {. M' S1 H O( w' p
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The Blocked ports currently are:) T8 o# r+ k' |4 S' y9 i5 H
; P7 E# E: }% S' F0 QTCP 21 (ftp)' l7 ~# Y4 N( v
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./ m W1 W. r! P7 V, O
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TCP 25 (smtp)5 C0 `! a3 V! r0 ^' j" ^
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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$ T4 T) Y, d* b& ^: ?+ \% UTCP 80 (www)
9 o4 S& U3 F% H& b ]' A% f" y2 YCustomers 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., |& ^; t7 l& U
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TCP 110 (pop3)
0 Z- r; ]/ Y& y( G) T( HCustomers 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.# B5 v; j5 o: a9 m' D/ c! R7 ?+ _+ A
0 s) X# r3 I) q0 N( c7 D% fTCP 6667 (ircd)3 D% I+ o- T& @/ `0 Y: p
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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" G& t5 Z" A/ q5 u2 ZTCP/UDP 135-139 (dcom and netbios)" h, j+ t! I' i/ A
These ports are commonly exploited by worm viruses:
$ s5 f4 l% H- x# Z3 v* q3 I135 Windows RPC
% ^. ~' R8 s( t5 d5 z5 H+ _- I136 PROFILE Naming System (basically unused)/ V3 K1 V$ r" [, s( @; M9 @
137-139 Windows NetBios" f* R% q9 ~" l8 f, z" z
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TCP/UDP 445 (ms-ds)
+ p' A4 o' _7 }% R+ n# zMicrosoft 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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$ J% a. f3 k& h6 q7 a# J; U7 eTCP/UDP 1433-1434 (ms-sql)5 J3 H: u" T" ?2 f( i Y2 F" W& W2 A
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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