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之前发过一个帖子有关Telus, Shaw 的比较, % }, l4 ]$ \. z1 X! `+ M( ~8 u
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。" Q: q7 ~: A% w# x9 f
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Does Telus block any ports? 0 |4 s5 q2 \' k: g4 [; |1 B" B
5 {, O1 Z+ [, P. b* HThe only packages with no blocked ports at this time are the Server packages. + W$ K E3 M" R5 W
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The Blocked ports currently are:* Q5 B* k0 H5 V
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TCP 21 (ftp)8 O5 d0 G+ U& ?2 c3 u. S
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.$ ^& q4 Q' {$ j# D2 t. y5 V
/ E* H1 l5 ?: X5 P# U3 Q& CTCP 25 (smtp)
$ V% G4 o0 c I$ k3 o- 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.
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TCP 80 (www)% ^7 S; A; Z" L$ E
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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" z& z% W! C' G( E" x% I. c, W2 ^7 cTCP 110 (pop3)0 Z& M2 k, U1 ]) b& V Q9 P& P
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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' N) R) Z$ C1 n1 d/ rTCP 6667 (ircd)
[# t9 Y: g+ gCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server." M* ^ i7 w, y
) h; ], J7 }- s6 g9 m: T! H) CTCP/UDP 135-139 (dcom and netbios)
) T1 o, t) o1 n* S1 S* g2 MThese ports are commonly exploited by worm viruses:
' o: g; K* J7 T; ?8 H% Y135 Windows RPC/ z1 j% F7 g3 a8 r9 B
136 PROFILE Naming System (basically unused)7 V M& V* d' G5 w
137-139 Windows NetBios( k' g& i- v' E4 ~' c+ G
! |6 k1 ?& P+ ]$ OTCP/UDP 445 (ms-ds)% X0 k" D- n2 [; s7 c( d
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 `4 J9 b; k! n; V5 _TCP/UDP 1433-1434 (ms-sql)$ c8 { Y1 K% c2 C d9 A
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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