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之前发过一个帖子有关Telus, Shaw 的比较, : o, ?+ j W: C: T8 @9 T: z$ Q
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? " I* O U+ ?% g/ v. @% z
# R1 |; |3 M. r/ `8 j$ g- @The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:, z& [5 i6 F0 I2 o1 e
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TCP 21 (ftp)* }9 Z; c& D. ?- K. C6 X( p
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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- A2 U' Z( Z4 ?2 h' r3 E9 a6 FTCP 25 (smtp)
( T( c% Y9 T- G X1 fCustomers 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)
( |1 ?' M) L, a' ZCustomers 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)0 ?# s+ G8 O Z$ d
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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+ Y5 u# U: `* D; q. xTCP 6667 (ircd)- J" w2 E6 Y+ ?# V' b
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server. E, Q0 p$ [# Q, ?) ?9 Y
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TCP/UDP 135-139 (dcom and netbios)" |* c1 I" [' k( b5 N
These ports are commonly exploited by worm viruses:# G$ `. T' G' r' j. e
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136 PROFILE Naming System (basically unused)
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TCP/UDP 445 (ms-ds)2 ]4 u( i4 a v6 A
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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" V, h9 X9 k7 z% V: n5 c2 W/ L/ p/ y* pTCP/UDP 1433-1434 (ms-sql)# O+ D' {* S* o8 M0 ^3 g
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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