|
|
|
|
|
Posted by GS on October 6, 2005, 7:28 pm
If you were Registered and logged in, you could reply and use other advanced thread options
Warren,
Thanks for info. Let me try with Class B on LAN side (172.16.1.1 and
netmask 255.255.0.0), if that class B IP address and netmask is valid?.
Thanks.
|
 
| |
Posted by Walter Roberson on October 6, 2005, 8:56 pm
If you were Registered and logged in, you could reply and use other advanced thread options
>Tom Stiller wrote:
>> are set aside for use as private IP addresses and are not routed.
>Actually, they *are* just as routable as any valid IP address. However, they
>are not used for Internet purposes. The border routers on any private
>network will not route traffic for these ranges off the private network.
Small amendment:
According to the RFCs, the border routers "must not"
route traffic in the reserved ranges off of the private network.
However, in practice, a number of them do permit the traffic.
Also common is that networks which are not intended to use one of the
RFC1918 private ranges internally might not filter out traffic
sourced from that range... which is fine until someone starts forging
traffic in the range... or until some NT system learns a remote private
IP through WINS and starts trying to send it it...
--
When Love is gone, there's always Justice.
When Justice is gone, there's always Force.
When Force is gone, there's always Mom. -- Laurie Anderson
|
|
Posted by David Ross on October 6, 2005, 7:32 pm
If you were Registered and logged in, you could reply and use other advanced thread options
Walter Roberson wrote:
>
>>Tom Stiller wrote:
>>
>>>are set aside for use as private IP addresses and are not routed.
>
>
>>Actually, they *are* just as routable as any valid IP address. However, they
>>are not used for Internet purposes. The border routers on any private
>>network will not route traffic for these ranges off the private network.
>
>
> Small amendment:
>
> According to the RFCs, the border routers "must not"
> route traffic in the reserved ranges off of the private network.
> However, in practice, a number of them do permit the traffic.
>
Yes but that's really a configuration issue not a hardware one. I setup
routers all the time inside larger companies where I have a
192.168.x.zzz handing out addresses with a WAN on THAT router set to
192.168.y.zzz. Nothing wrong with this. But some (many?) older (maybe
still) consumer routers will not handle this. Netgear does. I think
current Linksys units do.
As to why I do this. :) Various reasons.
|
|
Posted by James Knott on October 6, 2005, 9:13 pm
If you were Registered and logged in, you could reply and use other advanced thread options
David Ross wrote:
>
> Yes but that's really a configuration issue not a hardware one. I setup
> routers all the time inside larger companies where I have a
> 192.168.x.zzz handing out addresses with a WAN on THAT router set to
> 192.168.y.zzz. Nothing wrong with this. But some (many?) older (maybe
> still) consumer routers will not handle this. Netgear does. I think
> current Linksys units do.
>
> As to why I do this. :) Various reasons.
FWIW, my Linux firewall has no problem routing 10.x.x.x and 192.168.x.x
addresses via VPN. In fact, it has two 192.168.x.x NICs as well as the
10.x.x.x VPN, in addition to my "real" IP address, assigned by my ISP. The
computer at the other end of the VPN is on yet a third 192.168.x.x subnet.
|
|
Posted by David H. Lipman on October 7, 2005, 3:09 pm
If you were Registered and logged in, you could reply and use other advanced thread options
|
| Actually, they *are* just as routable as any valid IP address. However, they
| are not used for Internet purposes. The border routers on any private
| network will not route traffic for these ranges off the private network.
| Routers within the network can route traffic for these addresses.
|
| For example, most cable ISP's use Class A private addresses (10.x.x.x) for
| DOCSIS cable modems on their network. AT&T used Class B private addressed
| (172.16.x.x) on their private portion of the backbone, as do many other
| private networks of considerable size. It's not unusual to see addresses in
| that range as the last few hops on traceroutes once the traffic reaches the
| server's ISP's private network.
|
| And they aren't just "assigned by small routers". IP addresses are either
| manually assigned or assigned by DHCP servers. Most home "broadband routers"
| are NAT routers, switches and DHCP servers packaged in one box, but it's the
| DHCP server -- not the router -- that assigns the IP address.
|
| And while we're at it, the fact that they're set aside for private range
| address is irrelevant. The OP is trying to set-up a private LAN, which is
| exactly the purpose that these addresses were meant to serve.
|
| I would, however, suggest not using the Class C range if the ISP is already
| using the Class C private IP address range. If the router being used on the
| home LAN permits, I would try setting it to the Class B private IP address
| range.
|
| However, as someone else pointed out, this discussion is actually off-topic
| as it does not involve a cablemodem or cablemodem service. It would be
| better addressed in a networking group.
|
| --
| Warren H.
|
The first hop on my ADSL line from Verizon is; 10.5.63.1
--
Dave
http://www.claymania.com/removal-trojan-adware.html
http://www.ik-cs.com/got-a-virus.htm
|
| Similar Threads | Posted | | How can I access my Router which is on private ip address from ISP | October 29, 2005, 9:09 am |
| Router port light is always on | February 15, 2005, 3:50 pm |
| Router Timed port access? | May 2, 2005, 3:13 pm |
| The ISP giving leased line to home(cat5), wants to configure static private IP addr, can I use Router?. | October 1, 2005, 5:14 am |
| 5-port switch had Auto-uplink and Auto-detection, can I connect any port on N/W side? | February 12, 2005, 10:13 pm |
| Linksys Router - No IP Address from Adelphia | July 10, 2005, 5:50 am |
| Can I connect switch port of Router to uplink on another switch to add more PC's | May 21, 2005, 9:55 pm |
| ID IP Address of Cable Modem Hooked to Linksys Router | September 24, 2006, 10:54 am |
| No Internet Connection Between Router and Modem | August 21, 2007, 6:44 pm |
| My router is causing my cable connection to drop | April 23, 2006, 1:48 pm |
|
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML site map