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之前发过一个帖子有关Telus, Shaw 的比较,
- c+ p1 _' r4 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。
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Does Telus block any ports? " B7 m, Q1 u. }& F1 o
U+ J+ B, _8 u. G: OThe only packages with no blocked ports at this time are the Server packages. a+ p9 v7 I0 m& y1 w3 r) w! F
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The Blocked ports currently are:9 ~( b( ~3 V2 L6 p7 X
9 k% f8 F8 M; YTCP 21 (ftp)7 k$ G" ]. S5 S6 B3 O5 P! k
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)% ~! f' g+ B, I% p4 [) s
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.
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TCP 80 (www)5 x+ Q( h- f0 E# ?4 n
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.) {! ?0 `# s) h, |2 }! A$ b# L
& N6 C' ~0 e) a( x- tTCP 110 (pop3)
& {7 h: W q: l6 u W6 o5 |& kCustomers 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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8 q# x! i" z( m0 l9 h! |% yTCP 6667 (ircd)
; k6 p* M* {: s( x/ Q VCustomers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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6 K# a, |; N, o$ XTCP/UDP 135-139 (dcom and netbios)
) G I8 s- v; M1 e' h9 vThese ports are commonly exploited by worm viruses:
( c# m8 i9 Q! O135 Windows RPC
% g: w% l7 J$ \136 PROFILE Naming System (basically unused)4 t$ l( x3 R5 O9 P3 L
137-139 Windows NetBios/ q# X' G, C/ V
1 T7 h: D1 B+ E _! v6 RTCP/UDP 445 (ms-ds)% r: Y' }# F, }6 z a
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.( o2 {3 m, o5 z& A4 L: G( m
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TCP/UDP 1433-1434 (ms-sql)+ V0 N, B% t/ r+ Q0 E. Q" m; p
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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