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之前发过一个帖子有关Telus, Shaw 的比较,
$ ~& d; X' w: M! h2 _, A" r- _# T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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% e/ q; N' L4 L% D- TDoes Telus block any ports? 8 e0 v6 U* U* t7 Q
/ m& a0 H* |% s6 d/ S5 QThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:
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9 L& K8 j! {4 F. E! S- Y' ETCP 21 (ftp): a U% Q3 o! c( T1 R8 G- Q
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)
" t1 p3 d( y/ m8 d2 X0 x8 ACustomers 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.4 M6 X A1 k( z8 l
1 X, ]5 W& f9 Q) c- i# y4 ~* w7 r5 [3 QTCP 80 (www)
- O; N" p a. k3 hCustomers 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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4 l5 u: D/ q+ ^2 X" L- D7 Y- |6 PTCP 110 (pop3)8 l7 V5 \# X. n
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)
/ O9 M+ J# X" u. jCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.0 [# t& g) W$ @6 l
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TCP/UDP 135-139 (dcom and netbios)
# B) }0 J$ ]( t+ R) z% QThese ports are commonly exploited by worm viruses:
. O/ s, H t- w" u. u. T+ M135 Windows RPC v8 L0 g- B4 w/ D
136 PROFILE Naming System (basically unused)
; P+ m5 j) H% u$ o* }8 G137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)3 V3 P7 @! [5 f p
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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; s, ~9 c6 U0 V# J: E# |" CTCP/UDP 1433-1434 (ms-sql)
9 o- J% M( ~+ Y6 b. D7 Y; jMicrosoft 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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