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之前发过一个帖子有关Telus, Shaw 的比较,
& `2 o: M! W8 ?# K- E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。, ]. y! w8 `$ \- S$ R" @
# t" O8 Y0 ^7 CDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages. 9 P1 U" m; r( T# `* N
8 w# Y8 v, M5 o! D& W( F0 fThe Blocked ports currently are:) h! E3 P! D2 G7 R& A" k
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TCP 21 (ftp)
) k: n& Y+ R' d5 K2 `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)
& H) R' c! |" w$ r/ c# a0 n: }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., X& d; f) S/ P* L9 D. c2 ^# P4 @- L
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TCP 80 (www)0 B# V" M$ `) m9 v" d( Z
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)1 j. s. c1 Q: b5 y! a" ]
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." S3 h4 f" O! {& G
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TCP 6667 (ircd)
- t v \7 E! B; @Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.5 v, C" I2 o: n5 [; h' K& g
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TCP/UDP 135-139 (dcom and netbios)
) W; x- z7 k# S# l% g+ a5 M6 TThese ports are commonly exploited by worm viruses:7 k" Y- `- X' ]+ m; t0 E
135 Windows RPC2 H- q3 m b9 E; I2 D
136 PROFILE Naming System (basically unused)7 c3 V& W3 H5 \8 ]' K
137-139 Windows NetBios4 h. ]) F5 U2 p" Q
8 `. E9 `3 k! e2 f* |8 jTCP/UDP 445 (ms-ds)& e) [2 V* ]& u" ]9 k
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.7 u2 D9 [5 _1 i
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TCP/UDP 1433-1434 (ms-sql)7 @5 J( W; O8 |5 f
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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