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Mark
05-25-08, 11:07 PM
I have two computers connected to Internet via router. I use computer 1 and
somebody else use computer 2. How can I prevent computer 2 user from
accessing Internet when I am not at home?

David H. Lipman
05-26-08, 07:01 AM
From: "Mark" <dxt44@yahoo.com>

| I have two computers connected to Internet via router. I use computer 1 and
| somebody else use computer 2. How can I prevent computer 2 user from
| accessing Internet when I am not at home?

It would be based upon the Router used.
On my Linksys BEFSR81, under the advanced tab, there is the "Filtered Private IP Range".
Put the IP of computer two in and it will block Internet access. However it is a manual
process of putting the IP and taking the IP out to block and unblock that PC from the
Internet. You would also have to make sure that you password protect the Router so that the
user on computer 2 can't modify the settings.

--
Dave
http://www.claymania.com/removal-trojan-adware.html
Multi-AV - http://www.pctipp.ch/downloads/dl/35905.asp

Mark
05-26-08, 10:41 AM
How can I find out what the other computer IP is?

"David H. Lipman" <DLipman~nospam~@Verizon.Net> wrote in message
news:9Ex_j.1283$fk.724@trnddc06...
> From: "Mark" <dxt44@yahoo.com>
>
> | I have two computers connected to Internet via router. I use computer 1
> and
> | somebody else use computer 2. How can I prevent computer 2 user from
> | accessing Internet when I am not at home?
>
> It would be based upon the Router used.
> On my Linksys BEFSR81, under the advanced tab, there is the "Filtered
> Private IP Range".
> Put the IP of computer two in and it will block Internet access. However
> it is a manual
> process of putting the IP and taking the IP out to block and unblock that
> PC from the
> Internet. You would also have to make sure that you password protect the
> Router so that the
> user on computer 2 can't modify the settings.
>
> --
> Dave
> http://www.claymania.com/removal-trojan-adware.html
> Multi-AV - http://www.pctipp.ch/downloads/dl/35905.asp
>
>

News Reader
05-26-08, 11:48 AM
Mark wrote:
> I have two computers connected to Internet via router. I use computer 1 and
> somebody else use computer 2. How can I prevent computer 2 user from
> accessing Internet when I am not at home?
>

There are many answers to your question, most of which depend on the
capabilities of the router. Some depend on the nature of the
relationship with the other party.

If the other person is willing to comply based on your ability to
determine that they have violated your Internet access policy, then
"logging" may be sufficient. If you determined that the user accessed
the Internet when they were not authorized to do so, and you brought it
to their attention, would they correct their behavior, or would they
persist in violating the policy?

Logging features vary considerably from one device to another. Some are
highly configurable and would provide a record of the user's activities,
whereas others will only log attempts to access the network from the
internet.

Some routers provide the ability to enforce time-of-day access policies
for all users, or individual users.

You could configure the DHCP server (within most residential routers) to
lease specific IP addresses on a MAC address (unique to the computer)
basis, so that the other user would have a consistent IP address, then
enforce access policy (firewall rules etc.) based on IP addresses. Your
device may or may not have the necessary functionality to enforce such
policy.

If you were using an "authenticated" ISP connection (e.g.: some DSL
providers use PPPoE), you could use a non-persistent Internet connection
that required you to login to the router and bring up the Internet
connection. The other user would not be given credentials to login to
the router, and would therefore not be able to access the Internet
without your intervention (initiating a connection to the Internet from
the router).

Using a Cisco device in a residential setting, I would configure DHCP so
that they always had the same IP address, define access rules permitting
the specific applications they were able to use, apply time-ranges to
the rules, and use logging to facilitate ongoing monitoring.

You need to read your router manual in order to determine what features
are available to you.

Best Regards,
News Reader

David H. Lipman
05-26-08, 12:56 PM
From: "Mark" <dxt44@yahoo.com>

| How can I find out what the other computer IP is?
|


In a Command Prompt on computer 2 type...

IPCONFIG

--
Dave
http://www.claymania.com/removal-trojan-adware.html
Multi-AV - http://www.pctipp.ch/downloads/dl/35905.asp

ray
05-26-08, 04:36 PM
"David H. Lipman" <DLipman~nospam~@Verizon.Net> wrote in message
news:9RC_j.8512$9H6.3662@trnddc04...
> From: "Mark" <dxt44@yahoo.com>
>
> | How can I find out what the other computer IP is?
> |
>
>
> In a Command Prompt on computer 2 type...
>
> IPCONFIG
>
If the router serves as a DHCP server, we are not sure that the IP adress of
the second computer will be the same. If per example:
- the first online pc (master one) got 192.168.1.64
- the second one got 192.168.1.65
If you block 192.168.1.65 - that ok.
But if
- i power off all stuff
- i don't power on the (master one)
- i do power on the blocked pc
This blocked pc receives the first available ip
192.168.1.64 - which is not blocked.

News Reader
05-26-08, 04:55 PM
ray wrote:
> "David H. Lipman" <DLipman~nospam~@Verizon.Net> wrote in message
> news:9RC_j.8512$9H6.3662@trnddc04...
>> From: "Mark" <dxt44@yahoo.com>
>>
>> | How can I find out what the other computer IP is?
>> |
>>
>>
>> In a Command Prompt on computer 2 type...
>>
>> IPCONFIG
>>
> If the router serves as a DHCP server, we are not sure that the IP adress of
> the second computer will be the same. If per example:
> - the first online pc (master one) got 192.168.1.64
> - the second one got 192.168.1.65
> If you block 192.168.1.65 - that ok.
> But if
> - i power off all stuff
> - i don't power on the (master one)
> - i do power on the blocked pc
> This blocked pc receives the first available ip
> 192.168.1.64 - which is not blocked.
>
>

Most routers with internal DHCP servers permit you to define a "static
mapping" between a host's MAC address and the IP address you wish to
assign to that host. A host is still acquiring its IP address
"dynamically", but it is consistently leased the same IP address when
this functionality is available.

Best Regards,
News Reader