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之前发过一个帖子有关Telus, Shaw 的比较, 9 {$ h. s% U, F$ u1 v) W
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。6 m% R9 [2 u2 f( w. t
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Does Telus block any ports?
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* M/ ^ x1 l1 R/ S: a. s _The only packages with no blocked ports at this time are the Server packages.
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" D1 d- \7 M% _5 m+ t+ q2 H6 M `The Blocked ports currently are:4 F& ?0 F2 l* | _( ~2 o
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TCP 21 (ftp)3 u$ h2 Y; F$ X- T9 \
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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% w6 O* h# I( L6 B$ U) BTCP 25 (smtp)
; V0 t4 p2 I4 QCustomers 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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: T. i/ k3 f- |5 M! x5 u5 [TCP 80 (www)
% p G% u8 z5 r) oCustomers 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)
3 W8 \; a4 N2 V3 [" ~. X& F+ [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.7 e: P+ |+ @3 ~' u6 p
3 N/ u* T* t- D: c# tTCP 6667 (ircd)2 z" @- m0 i' O: k
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server., Y. b* P+ w: u" r" Z# v! F. ]
8 |- v3 U& d& T7 e6 E. u& a S/ V0 dTCP/UDP 135-139 (dcom and netbios) R9 [% }/ h" a8 o* n
These ports are commonly exploited by worm viruses:3 [+ n6 ], f& t4 C6 N2 |$ g- M/ u
135 Windows RPC
- Q* u2 D; O( k$ F, N; Q136 PROFILE Naming System (basically unused)
' f) P' w8 O2 f$ M137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)% P& _$ h }1 f( n7 E
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.# T7 I; S7 Q$ t* Q
' b1 p) r. ], ?' ?+ O# z+ d& YTCP/UDP 1433-1434 (ms-sql)
3 j6 Q* O* H; fMicrosoft 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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