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之前发过一个帖子有关Telus, Shaw 的比较,
% u& O$ d+ y- g1 A6 O& _$ y# z# q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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: k# r% ]; V" c0 C/ W4 o% C# ?Does Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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TCP 21 (ftp)( o4 H( `- n; a3 o
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.9 } B! U4 I$ l' P, {
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TCP 25 (smtp)( h4 T \+ o! o" p
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., U3 R1 d) [9 H# K* h& S
4 j9 N g: X9 U7 f) Z6 VTCP 80 (www)' ?7 F F4 ]4 k9 _
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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4 G, `- _ H0 X9 |) qTCP 110 (pop3)9 E O: p( M& J- c
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.! V2 r: k& ?1 V R) O/ t5 F8 U
! ?( K) U4 S) l" G- G$ H7 DTCP 6667 (ircd)
# o$ ^3 A6 q3 b& T; I. ACustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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/ _8 O; ]$ D6 d+ x, F4 VTCP/UDP 135-139 (dcom and netbios)( x( F; T$ z5 Q8 q# n
These ports are commonly exploited by worm viruses:
" p" [. M8 s% f2 S135 Windows RPC7 }* Y- p) h& I
136 PROFILE Naming System (basically unused)3 ^" C( |! ~( @7 \' F
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
" a: r! z/ G# IMicrosoft 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)' ~0 K' ~4 \3 F3 w% [; ~( T
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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