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之前发过一个帖子有关Telus, Shaw 的比较, * k1 m; G$ q: f) P
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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( w" }# ~4 h0 m4 {Does Telus block any ports? 2 ^* d" u/ ~* C9 {2 L
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The only packages with no blocked ports at this time are the Server packages.
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! c7 X3 M2 ^8 }3 K% mThe Blocked ports currently are:3 A( U: a! V6 @/ @' J0 S
8 s+ n9 w' U$ WTCP 21 (ftp)2 V* S; c/ O+ f& k5 k5 _
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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% J: |; K: |2 u- \TCP 25 (smtp)
. s4 p) l% N6 f8 KCustomers 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.- K/ {0 {! y7 N" ^
3 H+ W* z' {3 v; jTCP 80 (www)
; d( {: Y- U7 S3 o) K; w, LCustomers 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. Q C B& n3 n* {9 W2 |8 i
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TCP 110 (pop3)* `" x" I, \3 p( O2 {! s0 V; j1 x
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.# r, e6 @; X# n& r( t
; B( W& | v6 v' KTCP 6667 (ircd)5 m5 U: N3 v( q, a7 {& e1 O
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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3 y' Q/ ^# z, ~TCP/UDP 135-139 (dcom and netbios)9 E8 B. r* \5 r6 l, C
These ports are commonly exploited by worm viruses:' K7 R* H: F2 @; K( _1 b
135 Windows RPC
; q, T! g' ] s. z# B. X136 PROFILE Naming System (basically unused)2 N! W: L: Q, P3 C
137-139 Windows NetBios
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1 H0 l9 h6 O& Z# s! cTCP/UDP 445 (ms-ds)
2 \3 b# ~* m& `% d% i% _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.2 f: L1 s# p+ V8 @
0 u* k& Y% u7 I2 S% [TCP/UDP 1433-1434 (ms-sql)
1 ~3 d& `; {7 ^5 pMicrosoft 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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