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之前发过一个帖子有关Telus, Shaw 的比较, ! @/ r, W; O% t8 n
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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The only packages with no blocked ports at this time are the Server packages.
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6 L+ H/ q0 j6 k9 [7 B1 r4 i/ l7 ?* QThe Blocked ports currently are:
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# `3 `: P- q7 H' h- j; g5 P% I/ STCP 21 (ftp)
! D: I. N5 d% KCustomers 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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2 e" D3 O! o) lTCP 25 (smtp)
% w7 ]$ O5 u5 L* A! E) s% aCustomers 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.$ o( z F( Q( A! m& j& [. V
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TCP 80 (www)3 G3 b. x. `8 Y' g) ?4 N' [8 s
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.) |- e1 |. ]7 c6 Z7 R' \/ ~6 O
) J6 Y8 r! A, G6 o$ W/ C2 @TCP 110 (pop3)4 t# c7 r0 t5 J3 [' a- S
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./ `! M N, G( s* [/ d. ]& V
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TCP 6667 (ircd)3 _6 O- K% ~) g% L" Q$ m
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.+ I3 r# x' b4 O8 E2 G- F+ l$ P3 ]
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TCP/UDP 135-139 (dcom and netbios)% }6 k: M. L7 n
These ports are commonly exploited by worm viruses:
% Q8 y" ^7 X2 V$ o$ ?135 Windows RPC# f. H0 ]1 S/ W$ h6 ~7 t8 ^
136 PROFILE Naming System (basically unused)
$ y# \7 B1 k9 q137-139 Windows NetBios
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TCP/UDP 445 (ms-ds)6 l6 u; { Q. O3 t r# }
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 _' c9 u3 E# z3 b: f4 n; uMicrosoft 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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