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之前发过一个帖子有关Telus, Shaw 的比较, ) Z. s* I% e4 N. V, O& a4 d) c
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。2 ~, d0 L3 i5 i
: s+ L# h& i& `% Y9 J5 YDoes Telus block any ports? ; |4 R q/ |! @+ Z9 `% H
& U7 X" j5 g. u- gThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:# z1 `( A: r7 L2 h! @
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TCP 21 (ftp)6 Z' K2 T$ o: M! r2 o
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.
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TCP 25 (smtp)
% u% d$ A. ~8 T+ j* m' \, X/ }7 r( \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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H. h7 }. \! A7 ^/ t& ]TCP 80 (www)* i2 x- d: D4 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.6 N/ [0 w8 Z: a2 I9 X
! i2 U% \1 k' E0 \3 DTCP 110 (pop3)
9 \9 T" f: ^! _! f, p" U" OCustomers 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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5 v( d2 H( @/ w/ o1 rTCP 6667 (ircd)
" k' \8 O2 h" o. e4 M$ v2 {Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.& O5 a; L* O6 q
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TCP/UDP 135-139 (dcom and netbios)8 E l2 y* b2 a
These ports are commonly exploited by worm viruses:! ~3 t* e) Z; G, b( A* z
135 Windows RPC @1 B! c* k' y! m$ g- B: e. g
136 PROFILE Naming System (basically unused)
6 V1 x# Y9 B- b* p137-139 Windows NetBios
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; F7 u' Z0 _8 t# }( @# d8 W tTCP/UDP 445 (ms-ds)& M/ J8 _; R& Y2 D9 o8 s' f5 H8 d
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.7 b7 B- ?0 d, a/ N: I% W% R0 Z
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TCP/UDP 1433-1434 (ms-sql)
}$ C- W. p0 }+ s9 L5 a3 _. N9 `* @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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