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之前发过一个帖子有关Telus, Shaw 的比较,
$ ^( n% p7 X; t. r) f- r+ E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。& H" m9 f9 C$ u% g
+ U X- ^6 q, T7 R, h) U- X! IDoes Telus block any ports? , c, q$ U/ z( G, H
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The only packages with no blocked ports at this time are the Server packages.
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4 n1 l6 f, Q2 p5 `4 n) FThe Blocked ports currently are:
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TCP 21 (ftp)
* d: B- J& d \. n% o1 s* TCustomers 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)7 W5 ]( D' a' S: e+ [" d
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.1 k2 a6 n" S$ a8 {$ c* n8 M" P$ d# I
# Z7 U7 E5 n' \6 O) Y R/ pTCP 80 (www)
0 b; L& o7 i9 K( r4 @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.
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) B! P. g- T. i8 f% ~; wTCP 110 (pop3)/ M* L0 W) V1 H3 |5 V- q
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.; }7 w5 E4 t% C5 z. n
: {! L! E# [0 S2 N2 |) q& _- a0 MTCP 6667 (ircd)
! Z M3 S1 G. N3 i8 u* ]Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.9 _+ l5 P) r6 [; B c- X( m: _
P, n2 l% d3 QTCP/UDP 135-139 (dcom and netbios)
" u4 K0 t8 \4 C7 E! \These ports are commonly exploited by worm viruses:- f, W+ q2 o/ _+ P
135 Windows RPC
6 v8 \# n( E/ u5 P. v136 PROFILE Naming System (basically unused)
/ O7 r8 E% s* V4 E137-139 Windows NetBios* h2 T9 L! ]) R( g: Y2 q3 b
( |; k4 H* e( ETCP/UDP 445 (ms-ds). e& W- R! h& l, q5 i6 ^$ ]
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.5 K4 S* j9 W2 p/ F$ v
) r* `9 F9 c- k9 jTCP/UDP 1433-1434 (ms-sql): s. S* y6 F0 w' Q
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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