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之前发过一个帖子有关Telus, Shaw 的比较, 8 y3 x; b& E+ B6 g. z( 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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& O) Q. S, ~! c X- m4 F# N7 ^Does Telus block any ports? , z$ I: x; O g, O% M
0 k b, Y) g5 ?1 \- C7 b% GThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:4 Z; c ]3 }7 {3 M/ V5 t9 p( E
+ g0 n, G% n* GTCP 21 (ftp)
0 L' F6 |- a/ Q$ u8 }0 iCustomers 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)2 e. p* b Y; r" s
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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TCP 80 (www)
3 S! V, G0 h7 o9 ~; ]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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6 b6 i: L3 b" o( ]7 WTCP 110 (pop3)- D X8 N# t0 T d
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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TCP 6667 (ircd)& I- D) L7 ]; K. E
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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: f5 a( [/ y) T% G; J! x9 ZTCP/UDP 135-139 (dcom and netbios)
3 G: \2 x' H+ d1 |These ports are commonly exploited by worm viruses:
4 Y% b/ o0 l, {1 W, s135 Windows RPC: ~' R) p' T& A) f$ ]1 o
136 PROFILE Naming System (basically unused)
# K& i( h& V s: e, {137-139 Windows NetBios3 `& C( S; B* l
" [+ _% p7 T- O8 b) z+ u9 b+ aTCP/UDP 445 (ms-ds)
1 _3 s6 L1 R! X% F CMicrosoft 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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: m4 J/ u- s* a+ [5 T( U% YTCP/UDP 1433-1434 (ms-sql)- E/ t4 \1 |, d _
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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