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之前发过一个帖子有关Telus, Shaw 的比较,
6 o% ]9 H# l2 Y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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. M5 c* {) T1 L2 H. wDoes Telus block any ports?
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9 r3 h8 g1 @, |1 P9 zThe only packages with no blocked ports at this time are the Server packages.
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/ h6 `; C4 w7 v" j9 zThe Blocked ports currently are:
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9 J. D0 i* p. h' \TCP 21 (ftp)
" \ A& h$ Y! Q. g" SCustomers 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.# s4 {" Z3 A8 \+ d6 S: }4 I
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TCP 25 (smtp)
; g3 s+ a6 [4 q9 v1 cCustomers 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.0 J$ r W( N. C6 M2 r
7 ?) k. N! m+ ]TCP 80 (www)/ U- g2 C; h. G* ?6 T
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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TCP 110 (pop3)' M1 W/ a; X) D# I1 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.
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6 O( D1 g2 [1 j0 u: N/ NTCP 6667 (ircd)# y! ~ u) T0 z3 H5 X/ Z" x8 [
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.: s" A9 x7 c" Z( C+ _& k) c
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TCP/UDP 135-139 (dcom and netbios)
, h- Y0 D% }% e# S9 [: T' jThese ports are commonly exploited by worm viruses:
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* _+ j- c( f/ e- i136 PROFILE Naming System (basically unused)5 J2 H4 V8 I, P% z+ ?
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)' Z2 U. J+ Z u9 c* `
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); V+ a# d& F/ j8 v
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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