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之前发过一个帖子有关Telus, Shaw 的比较,
9 V7 { K4 O6 R7 B: h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。* U8 b! c% H. T$ f# e
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Does Telus block any ports?
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9 F+ T9 n4 l3 l$ p6 JThe only packages with no blocked ports at this time are the Server packages. - M5 N; B0 q5 s# i! I6 K
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The Blocked ports currently are:
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TCP 21 (ftp)
; x7 K& e6 [+ N6 O6 `9 sCustomers 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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1 j+ x; u& w3 |2 m7 XTCP 25 (smtp)1 F/ ~" H0 M6 ^$ j
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.1 M& M" {+ h* F1 q3 Q3 O# }. S
! O$ `4 @5 p; F9 T. rTCP 80 (www)" \5 f, l) R2 B, `2 Y
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)
6 ^7 S2 T3 W5 zCustomers 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)
/ T! U- g: J* N3 v2 sCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.0 I- P/ [+ q; F' G- U9 `
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TCP/UDP 135-139 (dcom and netbios)+ R) @& }* u- [( o2 T
These ports are commonly exploited by worm viruses:
4 Q% s* }( J: O; M! h) r* U) U1 h135 Windows RPC
3 K8 A1 Y; V7 F136 PROFILE Naming System (basically unused)4 W( K1 _; |6 p. d
137-139 Windows NetBios5 o! g9 G1 d0 w6 r) ^+ @9 i
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TCP/UDP 445 (ms-ds). \2 Z- ~0 \1 E! t' f
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); i7 ?% Y% [- l( {5 \! D
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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