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之前发过一个帖子有关Telus, Shaw 的比较, # ?+ j3 M3 E( y; M
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。4 U' b6 J) s! p' g
% @: K+ q3 l' LDoes Telus block any ports? ( T) w( C m- S0 t
3 p: D( W9 m2 E3 v1 ?1 }6 z, uThe only packages with no blocked ports at this time are the Server packages. 9 D9 u5 u. R1 E8 m
/ q# H* f) c" D/ k8 u4 ZThe Blocked ports currently are:3 E8 u2 o# t% l9 b+ i" V
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TCP 21 (ftp)
" z. t$ I* t& N" T/ dCustomers 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& Y6 C I- I4 Q, F
1 m; B$ D! v6 r( HTCP 25 (smtp)
) i5 e; P" l5 TCustomers 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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# @; _/ ?1 G8 d" |, \% d- h! f" |TCP 80 (www)
6 `/ p# N+ M% }5 J+ l, ]) Q ~# iCustomers 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)
7 b7 [5 ? f6 WCustomers 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." h& a$ w( j( B C& g, V
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TCP 6667 (ircd)/ t* Z+ e2 r9 ?& d) E; K j4 |
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)
# o8 V( v! J5 X) P0 e5 p: W o( ]( S/ WThese ports are commonly exploited by worm viruses:
: Q' k) b2 d$ v" ~8 b. H) @135 Windows RPC& v; D1 ?. D8 u) R& s
136 PROFILE Naming System (basically unused)
. ]% l. h ]4 F137-139 Windows NetBios
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' ?4 V5 {3 M: W$ a( ^: HTCP/UDP 445 (ms-ds)6 p3 k# m8 U( `1 k2 _$ e
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)
5 O" p% L4 {' J5 \; g4 XMicrosoft 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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