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之前发过一个帖子有关Telus, Shaw 的比较, 3 J4 q' s1 w8 N' g H' D9 m+ G
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。. [8 H; W9 e, p x! [0 g, {$ K
' Y: k( W1 h4 O& {2 s5 ^Does Telus block any ports? " P: I3 b# A0 p6 w A7 K
" R+ X- E9 G" K6 B: @The only packages with no blocked ports at this time are the Server packages.
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The Blocked ports currently are:$ M1 J( F. h) q* _
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TCP 21 (ftp)
- A/ `$ x% C) JCustomers 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.* T/ l7 I2 R9 l8 {. J
9 k& t8 u& w# c: s% F% UTCP 25 (smtp)6 l5 V) B9 e- s4 I: I: M q9 n
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.6 d/ g# T$ L7 A2 j8 i
& |1 J- ^3 c+ T) A" J2 ?# ~& G" ETCP 80 (www)) u7 @4 B! Q' _) K8 W+ a
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.) |7 r* Z1 b0 l9 w0 n8 E+ _
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TCP 110 (pop3)
6 M7 d& h8 G& o6 }$ d; \* A! XCustomers 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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- b& q4 f; ^9 I: qTCP 6667 (ircd)$ Y0 l$ e5 @4 _: W& j
Customers running a IRC server (Internet Relay Chat) will no longer be able to have Internet users connect to the server.' X# ?6 I) \" e0 E; F2 v; L1 k
: y- c5 ~1 o) x" [$ Y. g& {TCP/UDP 135-139 (dcom and netbios)$ Y# g. i' D9 b, w9 {+ ^* Y
These ports are commonly exploited by worm viruses:
. K2 G# K2 T# \4 Y135 Windows RPC
! v- ^! ]! s' ?9 Z# z+ @ M136 PROFILE Naming System (basically unused)4 s) {+ M" `2 Y1 i% R
137-139 Windows NetBios
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& q# X1 x6 v# X* X* U1 D( OTCP/UDP 445 (ms-ds)
# P( D k3 r5 c4 h* n1 c- ] @$ }- PMicrosoft 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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2 G" a% G8 X/ O4 f x+ bTCP/UDP 1433-1434 (ms-sql)* o2 J( u' \2 C" N' x
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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