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之前发过一个帖子有关Telus, Shaw 的比较, - `$ }1 i% h5 z. @
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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* C8 }/ ?) r$ m+ v' oDoes Telus block any ports? 4 w0 n$ j3 O# D% X
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The only packages with no blocked ports at this time are the Server packages. 2 o; n8 `6 M1 {- ~+ O3 _% H; \! W
6 Y5 O, M6 \& _The Blocked ports currently are:( f- `- r/ g, `9 O% Z8 C' `; C
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TCP 21 (ftp)! L% W; ^# G3 Z) `7 p- W9 Z7 v
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)
; l) l- T; }! K/ n/ lCustomers 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)& U( l8 W) R& b* _: r: L
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.8 _% u5 y$ |% W% q
8 i: X2 Q _, k+ bTCP 110 (pop3)
1 f5 M( `6 i( i) U/ {0 QCustomers 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.8 ?) y8 O# u- q+ ]
# V- B* I. v. fTCP 6667 (ircd)
* z4 o3 B! [) QCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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% P1 H8 K& T% R3 nTCP/UDP 135-139 (dcom and netbios)
: }; G/ L1 X) _8 dThese ports are commonly exploited by worm viruses:
- i- Z# a- ~: ] L2 ]135 Windows RPC
. h" d" B3 Y$ N9 s136 PROFILE Naming System (basically unused)- C3 q' }6 w# {8 h+ b9 m
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds), k& _. @# s. B6 x3 U5 `$ `
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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$ ~1 l: F* ~' F% n4 b+ f2 N5 YTCP/UDP 1433-1434 (ms-sql)* x d2 ~1 J8 D. \- @' I
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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