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之前发过一个帖子有关Telus, Shaw 的比较, 9 z- Q$ _- _ R
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。+ {4 t h% P5 R9 `" D" I/ ?
4 z \& ]/ y' A7 P2 iDoes Telus block any ports?
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:# w8 s0 _ e( t' Z6 Y
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TCP 21 (ftp)
7 v$ c/ ^# e2 p3 U8 G" }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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5 c$ \8 Y' ? _" ^* [; ?( y& STCP 25 (smtp)
5 M9 v% n; @( X9 e1 q' uCustomers 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.* H! S; ^; r7 b% |) b+ T
6 U4 w" a$ A; h" tTCP 80 (www)7 i' B8 ~6 R* q% ^ l8 c
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./ F! Q9 L1 T3 x2 u9 i; I1 L
6 G2 p" k; B: v; YTCP 110 (pop3)
% S3 u" W! H$ P3 g, B5 @. lCustomers 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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" d8 n( Z4 p) S- h. p0 U$ j& RTCP 6667 (ircd)" L9 i$ W$ w+ ]/ ~; S" Y1 |; ]
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.$ u3 [ E; a" ?! K6 U7 I
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TCP/UDP 135-139 (dcom and netbios)) Z& f( T' f# H, `, P) p7 T1 R
These ports are commonly exploited by worm viruses:
+ e) k6 M% n5 n+ h* h135 Windows RPC
9 t. M) Q1 O3 I7 v- J, _136 PROFILE Naming System (basically unused)" d W% L& s$ d% u- r; d( U
137-139 Windows NetBios: h3 M2 b+ _' ]. p, |* m# U
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TCP/UDP 445 (ms-ds)
- N/ e) z; e$ t2 G& k. E5 f cMicrosoft 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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8 m% S+ ?/ t% a1 oTCP/UDP 1433-1434 (ms-sql)
( L+ O* c- J; R- T, N' u9 IMicrosoft 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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