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之前发过一个帖子有关Telus, Shaw 的比较,
6 Y' i; ~% I% 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。3 y* K! e4 ~2 ?6 {5 Y
% @7 C K$ y. E/ G! A# GDoes Telus block any ports? & g3 R1 J* b: p! h4 R
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The only packages with no blocked ports at this time are the Server packages. 7 s5 ~/ o$ e' k4 H4 L6 f
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The Blocked ports currently are:
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& _0 c) p- }& u# JTCP 21 (ftp)
* d- m J) E6 p3 |# r: K/ mCustomers 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)
4 ^/ N9 g, o# D! nCustomers 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.( E' f9 \; W. v# K/ Q9 E
) x4 y' K% M: n ~/ WTCP 80 (www)
, x* v/ o+ m3 ~. l8 M7 VCustomers 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)
$ m' J# ]' Q ?( UCustomers 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.% C) J h2 x. Z2 i" P
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TCP 6667 (ircd)
" [0 |% h( i. r8 l7 G2 k8 T9 gCustomers 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)& L/ P) T9 V) {8 r+ {: b
These ports are commonly exploited by worm viruses:+ c7 B0 V% y2 ~4 R S( f, z% k
135 Windows RPC
+ k O4 e2 i) c! P136 PROFILE Naming System (basically unused)
, p$ C/ X3 l* H- ^137-139 Windows NetBios4 S9 k% e5 M m4 l/ U
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TCP/UDP 445 (ms-ds)/ p- x. z9 X& t* c
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.. W3 s, L* h$ W7 j0 R! q* F
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TCP/UDP 1433-1434 (ms-sql) P- H' K M6 k8 _/ w# ?( f7 e
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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