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之前发过一个帖子有关Telus, Shaw 的比较,
+ ^1 R) f+ {# |! J a& c! c8 v L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。8 a2 S$ t6 }% e4 d% P. u
8 ^9 `: P3 Y1 ]3 ^" r8 y) x# JDoes Telus block any ports? $ _- y8 {3 p; Z9 Y* x
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The only packages with no blocked ports at this time are the Server packages.
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2 n! K! `" L4 I0 s" nThe Blocked ports currently are:
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5 W& V! V8 \' F( l2 RTCP 21 (ftp)
/ ^9 Q0 {1 ~/ PCustomers 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.6 `( q) F; [3 W8 r
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TCP 25 (smtp)
: t# I. Y2 p* k' k: F' r7 {8 d. RCustomers 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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. w8 Y% Q% x* b; ~- RTCP 80 (www)
, P$ p8 ~! l, c7 J c! }" v& mCustomers 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.+ d; A- e3 j1 N% |2 H3 c
: H3 _3 i( x" J4 Z/ XTCP 110 (pop3)
2 x5 Q/ m. q; Y3 A( `, J/ f8 l" v+ tCustomers 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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1 m* @) T. }- J+ o! }+ ITCP 6667 (ircd)
: J2 X1 M/ D- }Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.# @& [0 a; E4 I9 p: n1 C1 q9 {& g
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TCP/UDP 135-139 (dcom and netbios)
# ]8 ]# N0 _8 t' D: @$ u1 DThese ports are commonly exploited by worm viruses:; b' \9 m/ {& _# P2 ]7 @: e
135 Windows RPC8 Y J- } V- _! X
136 PROFILE Naming System (basically unused): c1 j* t; l$ l+ [
137-139 Windows NetBios4 x( ~$ S& s# U1 [3 E& q
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TCP/UDP 445 (ms-ds)
1 D( N1 G5 j/ sMicrosoft 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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TCP/UDP 1433-1434 (ms-sql)
& F. g/ o6 o8 r) OMicrosoft 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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