Networking Forums

Networking Forums > Network Hardware > Network Routers > How did this connection get through?

Reply
Thread Tools Display Modes

How did this connection get through?

 
 
Brian Smither
Guest
Posts: n/a

 
      08-09-2005, 02:07 AM
I have a D-Link DSL-500(CZ) - firmware 1.14A - with port forwarding to
serve my various needs. But looking at ZoneAlarm's logs the other day, I
see that there have been two connection attempts to one of my various
computers, which were blocked. OK, having them blocked is why I have a
firewall.

But with port forwarding, how did this computer even receive the connection
attempt when the router does not have this particular port, 3167, forwarded
to this box? The router does not have this port listed at all?

I understand that if I initiate communication to "some where out there,"
the router has to keep track of which machine the reply should go back to.
But I'm sure these connection attempts are coming out of nowhere.

A Shields Up test specifying port 3167, capturing packets with EtherPeek,
shows no packets received from that port. So, either *now*, the router is
not forwarding that port, or ZoneAlarm is blocking it (but I get no
announcement from ZoneAlarm that it blocked that port).

What is Poweroncontact?

--
Remove INVALID from e-mail address.

Brian Smither
Smither Consulting
 
Reply With Quote
 
 
 
 
David H. Lipman
Guest
Posts: n/a

 
      08-09-2005, 02:08 PM
From: "Brian Smither" <(E-Mail Removed)>

| I have a D-Link DSL-500(CZ) - firmware 1.14A - with port forwarding to
| serve my various needs. But looking at ZoneAlarm's logs the other day, I
| see that there have been two connection attempts to one of my various
| computers, which were blocked. OK, having them blocked is why I have a
| firewall.
|
| But with port forwarding, how did this computer even receive the connection
| attempt when the router does not have this particular port, 3167, forwarded
| to this box? The router does not have this port listed at all?
|
| I understand that if I initiate communication to "some where out there,"
| the router has to keep track of which machine the reply should go back to.
| But I'm sure these connection attempts are coming out of nowhere.
|
| A Shields Up test specifying port 3167, capturing packets with EtherPeek,
| shows no packets received from that port. So, either *now*, the router is
| not forwarding that port, or ZoneAlarm is blocking it (but I get no
| announcement from ZoneAlarm that it blocked that port).
|
| What is Poweroncontact?
|
| --
| Remove INVALID from e-mail address.
|
| Brian Smither
| Smither Consulting

Go into the router and specifically block both TCP and UDP ports 3167.
--
Dave
http://www.claymania.com/removal-trojan-adware.html
http://www.ik-cs.com/got-a-virus.htm


 
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Reject connection by machine name, accept connection by DNS alias Scott Bass Windows Networking 3 11-20-2008 04:11 PM
VPN Issue, connection unserviceable after initial connection succeeds astochlia Windows Networking 4 09-12-2006 05:49 AM
WRT54G wired connection versus wireless connection - what is different? Ook Wireless Internet 0 03-26-2005 03:04 PM
Belkin F5D 7630-4A keeps dropping connection BT broadband connection Chris MacNeil Home Networking 3 09-07-2004 02:03 PM
Re: how to enable Internet Connection Sharing (ICS) to share the dial-up connection Steve Winograd [MVP] Windows Networking 0 08-08-2003 07:27 AM



1 2 3 4 5 6 7 8 9 10 11