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之前发过一个帖子有关Telus, Shaw 的比较, # G* d6 U S7 S8 w
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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3 X. h! d8 {5 B: q- |Does Telus block any ports? # k5 U9 U- A/ N# |9 Z2 r
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The only packages with no blocked ports at this time are the Server packages. 3 H7 M" N: Y1 ^5 `7 ?& F0 v
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The Blocked ports currently are:4 T0 G' D1 N- K7 B/ ?9 C2 W
4 f3 g6 _( R sTCP 21 (ftp)
2 p. A W& G1 z# x0 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.; p: v% h# C, y' m6 n
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TCP 25 (smtp), q" k4 D0 R' o2 \4 q4 k: 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.8 m8 A; t: c2 m. |2 F t
Q- i/ f. L) [8 x; i2 kTCP 80 (www)
" g8 Q( Z8 e3 D8 ]4 F M) ACustomers 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.& `( V! _, V* s& i) ~
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TCP 110 (pop3)
$ A, ]7 C0 S, Q$ \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.$ v7 ~# H1 ~% M+ J0 a
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TCP 6667 (ircd)
+ F8 U0 s1 v' R8 F$ @6 LCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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- }7 r& ~, a2 D& K& {, MTCP/UDP 135-139 (dcom and netbios)& W5 X# ]7 p; i
These ports are commonly exploited by worm viruses:; p- o- M" W' G4 s* l+ e+ M( v
135 Windows RPC- S' ^5 g0 L& w2 j3 |1 U
136 PROFILE Naming System (basically unused)
( y! u e: r" S- Y x' Q137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)
% C1 T( v- U2 A+ _- WMicrosoft 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.6 U. h0 ` V9 ^, C3 ?( G8 Q$ @
" m; @* g: V$ X8 tTCP/UDP 1433-1434 (ms-sql)
* x! \: a) ]& x T7 W) eMicrosoft 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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