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之前发过一个帖子有关Telus, Shaw 的比较, 9 s" s' }8 b2 H& p+ T2 Z. X% y- ^+ f
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。) q+ `( v O' \6 ^, B+ J
5 M2 j3 E1 [0 D4 ]+ A8 L& w9 r/ nDoes Telus block any ports? + A+ w8 d# L$ l& b- k
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:, y" d" p8 Y8 s, ~ r, k3 F
& Y$ l) E1 w2 C$ J1 W8 t( p0 E- YTCP 21 (ftp)
' k8 \3 r& H% T; w" KCustomers 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)) } |) D# P$ w6 Q
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)
6 ^2 Z- P* y) z$ yCustomers 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.; y- K2 u9 w) X
: \! {; d* u8 l! P% O% n& A) qTCP 110 (pop3). t* Y/ c* `0 K+ S
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)" L: G7 m$ `0 ~
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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7 e: W" I5 B( _TCP/UDP 135-139 (dcom and netbios)% r9 @9 q+ W# S0 o; M: {3 ]
These ports are commonly exploited by worm viruses:7 \% K! y% g+ l7 Z# s5 [
135 Windows RPC& |' q( w* _7 M. y
136 PROFILE Naming System (basically unused)8 c# l; p+ Q- c( J
137-139 Windows NetBios7 d, K* K' x6 ]: Q2 c( g6 h. o
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TCP/UDP 445 (ms-ds)
3 G* E' Y7 M" B: R8 E, yMicrosoft 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.8 Z$ Y" g/ [8 o
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TCP/UDP 1433-1434 (ms-sql)
3 E; \4 z+ q' X- W( V; o3 R( X+ }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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