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之前发过一个帖子有关Telus, Shaw 的比较, - ]. Q6 J2 `+ r, Y( C8 \- {
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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Does Telus block any ports? / {4 |2 s( {0 t" w/ Y* B1 g# ~+ o
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The only packages with no blocked ports at this time are the Server packages. 6 l! W. w# `0 Z4 q: h, S
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The Blocked ports currently are:. y* w0 d2 U+ v) S
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TCP 21 (ftp)
) g# s9 m! Y- 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.# k3 o" |$ @4 m
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TCP 25 (smtp)7 z' ]. ?& a3 k8 W6 ]" J4 k
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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- h7 h7 I( a: D; |$ r* W6 r( H, @TCP 80 (www)7 x% \. J- B8 e5 e$ ~- `
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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9 [* G: z# ^" q* S" z4 eTCP 110 (pop3)
( d" i# B1 h( CCustomers 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)
9 f3 V8 n: b* w- t% lCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.4 m& s, d# Y+ q7 u6 ?' ?2 @
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TCP/UDP 135-139 (dcom and netbios)" q" R) t- \1 A! K& ]/ J
These ports are commonly exploited by worm viruses:
: f( M/ g/ [5 P# F* G135 Windows RPC
, q) p% a0 c$ ~! o136 PROFILE Naming System (basically unused)
; P: }3 F6 v- P! Q* F1 v1 M137-139 Windows NetBios
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6 ^9 \8 U8 U, Z& W! u( a- S8 _TCP/UDP 445 (ms-ds)
0 A0 {' k+ W- @9 o: j" R, }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.
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2 D8 q& F$ I, @TCP/UDP 1433-1434 (ms-sql)- K5 h' s7 j3 c: o, o: i
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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