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之前发过一个帖子有关Telus, Shaw 的比较, " y: y/ a+ N8 d7 o5 |- @
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。* ~: k. n' u, m4 B4 |$ i
& P% Y! J5 d/ V2 w( gDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. 7 \+ l" M7 b- @% k7 a/ w" M% w
. w, Q3 j, O }- x- UThe Blocked ports currently are:
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, I2 a' c& B5 n9 G1 A$ UTCP 21 (ftp)
" y$ F% E: u5 s4 y 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.
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TCP 25 (smtp)* V& |, ]/ E6 f2 Q: P( u* q
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.# ]. X1 ^0 y! y% u6 {) d
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TCP 80 (www)
7 h9 l9 |5 a, e8 }0 xCustomers 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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( {6 ^: I$ q& K! ^! k& FTCP 110 (pop3)# ^8 p- F7 B! 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.9 E$ X" b9 O5 Z" k
( Y& g6 ?5 s6 G7 tTCP 6667 (ircd)
+ w# ?" y; h: xCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)1 |1 V, M- b4 W) p( {7 L
These ports are commonly exploited by worm viruses:6 f: r2 I$ H% W/ I
135 Windows RPC
T) w5 [" f& x9 w( x136 PROFILE Naming System (basically unused)
( @% M. L2 a x, r; u2 a! q1 G137-139 Windows NetBios3 B- d$ C1 b, Q
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TCP/UDP 445 (ms-ds): ^% h7 `2 A. w/ U h: ` j) {. L" n
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.2 d* k1 \9 v# b; ]+ T
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TCP/UDP 1433-1434 (ms-sql)
& r8 W* I! c9 I0 WMicrosoft 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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