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之前发过一个帖子有关Telus, Shaw 的比较,
! x/ c( a- y) N. }) 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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9 A J; M, V" n$ z- nDoes Telus block any ports?
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! ]/ y' X/ I( k9 PThe only packages with no blocked ports at this time are the Server packages. , R3 |( s6 u$ Y! F* c8 Y
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The Blocked ports currently are:/ k9 B" H- l0 o, h- n
/ |8 }( |7 G" C/ ~+ ?( ZTCP 21 (ftp)
# t' c( p: X1 R/ l% L# f& p* Y0 KCustomers 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.; \) Q3 O+ A0 {# Z# T9 W5 r6 o
# H" m* J/ U5 YTCP 25 (smtp)) B7 I9 A* x, k# O" w" J% }$ x
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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TCP 80 (www)
8 [6 } b. V/ w3 G0 gCustomers 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)& N. |" `: [7 N) s
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.
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TCP 6667 (ircd)
: E' D" W% Y" t0 ?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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5 j* t/ N0 [; ]: o) Q8 E% lTCP/UDP 135-139 (dcom and netbios)+ Q! g+ u3 C# f4 E. k: I
These ports are commonly exploited by worm viruses:: Z! @: ^; U( R! T! E
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136 PROFILE Naming System (basically unused)
3 a3 u/ Q# x9 R/ W: G137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)& d8 ?# m9 e9 g
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.8 D3 n% S5 G0 Y3 \) B% x% p
# U8 c( a z- S2 m3 W; ]TCP/UDP 1433-1434 (ms-sql)+ `6 W0 A, }; C+ J7 }! Q0 w! o
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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