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之前发过一个帖子有关Telus, Shaw 的比较,
& T$ e" H9 F" G5 Z/ }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 J& S3 r9 z4 x
I* V8 a. M$ K/ B' r4 FDoes Telus block any ports?
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6 b# g7 }6 R' [. P, X& vThe only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:: \+ s- ]0 U) ?; F2 i' L, n
( ~1 B+ ~$ H$ VTCP 21 (ftp)
& u' A3 G! P9 ~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)0 d0 U% n9 S1 {) g) u% L7 f$ O. m9 q6 v
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., s) }5 p7 R) j# s
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TCP 80 (www)
. A! R- ]1 R( @! Q3 y) ~7 DCustomers 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.# m7 z3 ]/ r' s: k; d/ Y7 M5 u* x
# B# I0 p$ h6 ?/ yTCP 110 (pop3)
5 Y1 W0 {; I% C8 oCustomers 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.( X I/ G! i w2 u, X- Q
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TCP 6667 (ircd)
3 J- I& p) ]/ G; B, 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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; n. g+ w/ m+ j9 Y8 UTCP/UDP 135-139 (dcom and netbios)& q* Z5 _% o$ k9 g4 }
These ports are commonly exploited by worm viruses:2 l0 b. E- ~0 d/ M
135 Windows RPC
% Z" P4 X7 s7 h0 W136 PROFILE Naming System (basically unused)- l8 M. u' q* @/ l' `+ q6 f% a
137-139 Windows NetBios) e( |( }% H7 R& v/ G7 r3 l* B* ]
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TCP/UDP 445 (ms-ds)
) o- b5 V& n9 [) q; M- FMicrosoft 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.$ S3 v1 E5 W( v! `; M* T7 Q9 A
" [8 h6 H, n' r& C; e! pTCP/UDP 1433-1434 (ms-sql)) o" U9 n& j: y
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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