1841 router <--> home router

[frank.ring]

Hello,

here is a simple setup. The home router is also modem/gateway and has its own DHCP server.
How do I get the home router to recognize the network 10.0.0.0/24, it does not have the possibility to enter static routes.
Ping is possible in the 10-network, I can ping the outer interface on the router but nothing comes back from the home router. Which setup would work?

[Joseph W. Doherty · Accepted solution]

Many home routers will only directly support a single, or possible two (2nd for wireless), 192.168.x.x/24 networks; possibly that's your case too.  (One reason for supporting only one or two /24s, as a /24 supports 254 host IPs, it's often assumed this is sufficient to support a home [or small business].)

Your 1841 may be capable of NAT/PAT.  If so, you can have your 10.0.0.0/24 network behind a 192.168.x.x. IP supported by your home router.

[frank.ring]

Thanks a lo Joseph, the solution with NAT/PAT was successful. Now there are more challenges with port forwarding waiting for me - there is still a lot to learn on the cli

[Joseph W. Doherty]

You might find, port forwarding, a particular challenge when using PAT.

Much to learn on a 1841 CLI?  Indeed.  I recall the 1841 is, more or less, about a full features (depending on installed IOS) as larger ISRs.

[frank.ring]

Basically the CLI is intuitive, here is the configuration as I currently have it working (for testing purposes only - here on a 1812 router)
Network 192.168.10.0/24 is set up as vlan 10.
The 192.168.1.0/24 network is the side of the "provider".
Interesting maybe for other forum members are the lines to "ip nat inside / outside".

*******

!
ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.10.1 192.168.10.100
ip dhcp excluded-address 192.168.10.150 192.168.10.254
!
ip dhcp pool vPool10
network 192.168.10.0 255.255.255.0
default-router 192.168.10.1
dns-server 8.8.8.8
!
!
!
multilink bundle-name authenticated
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
interface FastEthernet0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet1
ip address dhcp
ip nat outside
ip virtual-reassembly
duplex auto
speed auto
!
interface BRI0
no ip address
encapsulation hdlc
shutdown
isdn point-to-point-setup
!
interface FastEthernet2
switchport access vlan 10
!
interface FastEthernet3
switchport access vlan 10
!
interface FastEthernet4
switchport access vlan 10
shutdown
!
interface FastEthernet5
switchport access vlan 10
shutdown
!
interface FastEthernet6
shutdown
!
interface FastEthernet7
shutdown
!
interface FastEthernet8
shutdown
!
interface FastEthernet9
shutdown
!
interface Vlan1
no ip address
shutdown
!
interface Vlan10
ip address 192.168.10.1 255.255.255.0
ip nat inside
ip virtual-reassembly
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip nat inside source list 10 interface FastEthernet1 overload
!
access-list 10 permit 192.168.10.0 0.0.0.255
dialer-list 1 protocol ip permit
!
!
!

*******