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之前发过一个帖子有关Telus, Shaw 的比较, % @: d1 u1 s2 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。! I t# H" D' p7 w8 B
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Does Telus block any ports? 1 ^3 O- l8 {: C# S
* D' z6 y G5 ]* Y$ X. J) sThe only packages with no blocked ports at this time are the Server packages.
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# Z2 N8 ]% ]3 gThe Blocked ports currently are:3 Y& O& l' D& w$ | Q# X( Q" S
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TCP 21 (ftp)# v& D* _( ^- V$ E6 m4 k4 m* b
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)
' A+ f' m* A+ ~& fCustomers 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.3 e! H( Q% R: n0 h
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TCP 80 (www)
* d/ w5 m- K# j; w8 uCustomers 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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9 w$ n$ W% Z. ~6 d& F4 TTCP 110 (pop3); S4 H: t, m# R3 }4 J
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.! o3 `3 f* X( ?2 E
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TCP 6667 (ircd) c0 Z1 Y0 q) p; P# \" b c
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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& E1 Z) B! U4 W3 C! L' E) sTCP/UDP 135-139 (dcom and netbios)
8 R* {" B; ^4 M, E9 z5 TThese ports are commonly exploited by worm viruses:
5 j8 q4 w5 e, E3 u/ c135 Windows RPC! D% c$ k( e. W& V' z6 h
136 PROFILE Naming System (basically unused)' H0 a9 f6 h8 A* j
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
; j0 ]) k. @' LMicrosoft 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./ E# y! ?& K1 u; e+ V/ \# V
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TCP/UDP 1433-1434 (ms-sql); \) ^- }/ D# P+ k# I+ n6 I% P$ M3 C
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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