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之前发过一个帖子有关Telus, Shaw 的比较,
. g5 ?: p" T, f/ @* i; V5 D' J( j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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Does Telus block any ports? ) t, m0 [ y# q, f
2 q6 `% A& u. X, d5 uThe only packages with no blocked ports at this time are the Server packages. , L9 I' r- K/ e6 g+ d
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The Blocked ports currently are:
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TCP 21 (ftp)$ h8 f! ^: h4 r3 o n: f* X
Customers 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)3 u" k" b' c! P* s" N# F1 \$ p
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). q6 R& i4 k$ y3 G1 m$ N0 O
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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0 D: e- ?' s H: DTCP 110 (pop3)
. L9 l8 g u* @1 j5 eCustomers 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)
. k$ }8 G" ]8 q5 L! w% b4 BCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.# S) p% v2 p- c+ x
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TCP/UDP 135-139 (dcom and netbios)7 h3 F6 g! p0 Y" P. P
These ports are commonly exploited by worm viruses:
" F' Z* \0 q) p$ Q. V3 Y135 Windows RPC2 [8 w0 j# l8 P. ~
136 PROFILE Naming System (basically unused)
: ~3 r1 s* r- d137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)% ?9 v0 ] p2 A& i. S
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)
2 b" v6 K; j' g. MMicrosoft 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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