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之前发过一个帖子有关Telus, Shaw 的比较, 4 i8 M9 C" s: t) @0 h1 M3 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。% D5 j, g! A: B5 h
. J5 b7 s. M) J. A0 tDoes Telus block any ports? / t, u( a( P+ \7 ^# H
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The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:7 r( b; w/ Y, Q, Z. R
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TCP 21 (ftp)/ Z: V5 O `" j a, k; C; r
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)! ]/ Y8 e4 d7 [% r8 ~
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.# B9 A& Q( \4 a8 h9 F6 ^4 o
" [/ t# Q* w( W2 u- FTCP 80 (www)
8 J, `& S& D$ L: r$ h) C; OCustomers 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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TCP 110 (pop3)1 P5 z1 ^# |8 D
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.
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3 W/ {* O$ `- i E3 cTCP 6667 (ircd)7 J& c5 f* r" r! ]. w
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server. g c0 Y# l2 A" B, d1 e2 p8 h$ [
) M# @' ?: O1 _- {0 kTCP/UDP 135-139 (dcom and netbios)8 B+ C7 z" m- q9 d/ m. y( G3 {
These ports are commonly exploited by worm viruses:5 q4 Y) S# A- v0 k2 ]
135 Windows RPC
& x: `- \. t" M# X& U136 PROFILE Naming System (basically unused)' H. k) O# t& z H
137-139 Windows NetBios8 t. Q6 H* j) M2 ?
5 C+ y- F0 W A S. g/ [TCP/UDP 445 (ms-ds)
7 S2 H0 n2 | yMicrosoft 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.0 S( w: Z9 v' g* N
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TCP/UDP 1433-1434 (ms-sql)# f4 s# M" B- [3 G1 F9 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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