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之前发过一个帖子有关Telus, Shaw 的比较, . J" G* z4 |7 x
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。4 J1 A$ h5 Y7 p2 D" [7 T
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Does Telus block any ports?
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) i( y3 i' }# M6 E1 J3 }The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are: k4 }. c& c) Y; D! {
" R6 B8 ^, B9 K# ETCP 21 (ftp)
7 ]& R- y2 x' ^) |6 z2 p: V; DCustomers 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)' i5 N5 {3 [9 C9 N/ G- o
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. a8 {: _/ B& o7 s
% N! t$ T$ f# Y- l6 BTCP 80 (www)3 B% R; Y! L" M+ j4 P* b. r
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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TCP 110 (pop3)# V# J/ \" E. |! X: ^# B* e
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)( J [% v6 p" X! O7 {- {
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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TCP/UDP 135-139 (dcom and netbios)6 A3 s k9 l o; f
These ports are commonly exploited by worm viruses:
$ {4 d8 G2 z. m( |135 Windows RPC. I2 p+ m) i3 b; X2 b
136 PROFILE Naming System (basically unused)
# S1 t. F1 ]/ @" \, h137-139 Windows NetBios4 h# r' m3 y y4 u2 |5 ~
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TCP/UDP 445 (ms-ds)7 D9 ~1 p2 W0 z& E, r# L
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., l$ z1 T }+ r' X3 O7 U5 S
0 \9 C' d0 t7 _TCP/UDP 1433-1434 (ms-sql)2 p7 q7 I) v; V" S& p, Y2 M9 H
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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