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之前发过一个帖子有关Telus, Shaw 的比较, + @6 W" s3 R) T
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。5 K2 p) K- Q0 g, V
& u7 C+ @) c! j. A4 B0 t1 rDoes Telus block any ports? i, @6 Q% D0 X+ K; G: P1 A5 ^
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The only packages with no blocked ports at this time are the Server packages. . }9 V5 u( h$ ]2 U8 F
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The Blocked ports currently are:7 a) d% u5 q& B j) ?9 R4 U( [
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TCP 21 (ftp)
. s6 n- v! s( ~; {% Q1 aCustomers 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.: ?, t: o+ a- v5 _+ R; C9 I
; O; I L2 F2 xTCP 25 (smtp)
; n' S( u6 V9 C; F' v8 K: |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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% ]/ F) U, A7 U) cTCP 80 (www)
9 j+ V, a8 E) Q! q/ v% P3 C, pCustomers 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.: R; L- `0 X& Y8 C7 y8 K
6 V6 \3 J, F7 Y& `TCP 110 (pop3)
1 r+ p6 d7 t/ V- W# fCustomers 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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! D- X' _' `* x2 ]TCP 6667 (ircd)0 e% t' n( P7 [
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.
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TCP/UDP 135-139 (dcom and netbios)
* O$ ^2 ^# ?/ w, ~8 @" a1 v3 uThese ports are commonly exploited by worm viruses:
* H% u& [9 Z+ T, @! ~& I135 Windows RPC# F9 E5 m8 ~* Z& b3 C) \1 X
136 PROFILE Naming System (basically unused)/ m: n& S# ?# {
137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)0 P) q2 g, c, D, W
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.& k2 W3 a* C8 K- O6 q9 {( ]( A
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TCP/UDP 1433-1434 (ms-sql)
e8 V. z! G/ \' g- wMicrosoft 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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