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之前发过一个帖子有关Telus, Shaw 的比较, : H! k) \, w- _, @" f; q
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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$ u2 M- p7 p6 x o2 M, k: EDoes Telus block any ports?
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( Y, C5 `0 O: b) h& r" IThe only packages with no blocked ports at this time are the Server packages. 2 T# F3 P- ^' n0 _. I+ l
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The Blocked ports currently are:
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TCP 21 (ftp)
: \& r( _5 [- U7 D4 b# z8 P: {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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" e7 J3 X8 q- `8 ^TCP 25 (smtp)
# C5 z) Y) W+ H7 u+ l/ bCustomers 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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" C, n4 y; f4 K5 y4 J$ N- s/ @% nTCP 80 (www)
0 j1 r2 y4 I9 k* b% ^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.% g& ^' {- n% ]( k- p# s0 `; o! ?9 @
5 Q2 N( P# M% P1 |) Y* VTCP 110 (pop3)
' w+ y y. F, i5 E% t7 JCustomers 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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TCP 6667 (ircd)) P2 S% a3 J* c) N( s. X0 X
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server." Y1 u, t. G5 S
6 g/ s2 s" g) J+ G( UTCP/UDP 135-139 (dcom and netbios): E) b D% B4 ]
These ports are commonly exploited by worm viruses:1 q7 M. o# R* A4 L5 G
135 Windows RPC2 Y0 K; q. v+ e4 S9 K4 t
136 PROFILE Naming System (basically unused), l/ \) O% c) F; t
137-139 Windows NetBios% `& u5 Y# D: \/ t
7 I8 [& d m. ?- b, |TCP/UDP 445 (ms-ds)+ ~# `) T# O8 N& k: }0 W$ ]2 n
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)1 k, h) y0 T8 E' c; Q: `; I
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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