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之前发过一个帖子有关Telus, Shaw 的比较,
" h2 x9 T+ l: F# o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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5 x3 F& j* r1 \Does Telus block any ports? ' I9 G8 D- y3 R' {# e+ [$ U' d. d
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The only packages with no blocked ports at this time are the Server packages.
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! [/ H& r3 R P7 t+ c- `The Blocked ports currently are:
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TCP 21 (ftp)0 |! d# U4 V) D/ G$ s
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.# m( ?1 @: g9 M- m8 D( j
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TCP 25 (smtp)
8 e i* Q* L& F- ICustomers 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)+ B3 u4 U. }3 S8 i( c6 J
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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; p X* Q* j' D- CTCP 110 (pop3)! f1 }" F4 `% o4 z
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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1 E. o# l# E V+ A" ]7 ITCP 6667 (ircd)2 q/ _' {0 A" @! c7 B3 ]5 G
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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TCP/UDP 135-139 (dcom and netbios)
1 l' ?8 E$ c y2 X4 R `These ports are commonly exploited by worm viruses:
: O; a) d) E G) k6 ]135 Windows RPC5 z1 V& E8 e0 F* R u
136 PROFILE Naming System (basically unused)
& X' l4 y6 `5 o! t137-139 Windows NetBios0 B0 t( s! [" ~/ H# F6 ~" `* J
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TCP/UDP 445 (ms-ds)
$ i: }1 [* L/ P; S) m, ^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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TCP/UDP 1433-1434 (ms-sql)
, k5 J5 i2 p, X _% ]3 t8 ?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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