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之前发过一个帖子有关Telus, Shaw 的比较, + f' o. @/ Z+ g2 H0 L. k
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?
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- m+ y- ?% I0 D, X% cThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:' O* _( g/ i+ T3 h# L, {
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TCP 21 (ftp)
+ R) @/ H; z ]2 n ]! c1 lCustomers 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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y2 ?9 d8 M+ j6 ^8 |$ oTCP 25 (smtp). h, m) _* H& Y+ F6 }1 c# D& O
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." l2 u* M' v; E) h/ }4 n3 X/ J
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TCP 80 (www)
; D' _0 H. Y6 ?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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9 v. A1 T" H0 J QTCP 110 (pop3)0 j' M' E0 L3 N/ f8 F
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.0 D- ?( a, n& O' M/ @, ?& U
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TCP 6667 (ircd)
1 o& r ]- Z. V" H* |1 T: i& VCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server." s0 H* l3 }$ f
! N7 x6 R- K6 B- S0 ?$ gTCP/UDP 135-139 (dcom and netbios)
& M- W2 {( }7 M) p: h2 aThese ports are commonly exploited by worm viruses:
) t$ h5 W6 ?% u6 W H2 f135 Windows RPC
* A" I/ D% D) R% _136 PROFILE Naming System (basically unused); @4 } {) o4 G; E8 g* d
137-139 Windows NetBios( d% |% s, j& `) B9 Y d7 A0 D
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TCP/UDP 445 (ms-ds)1 K0 h( W" a+ i9 m' k8 C) c
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)
5 v' Q3 ]! z4 L! c# F- A5 OMicrosoft 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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