Internal device network
From DD-WRT Wiki
Your network device (commonly referred to as a "router") has an internal network. The internal network connects the internal physical(=hardware):
- switch
- wireless access point
with the:
- network processors default internal device network and services.
Contents |
[edit] Modifying internal network
Via the user interface you can modify how the hardware is logically interconnected with each other and with your software services.
- Note: It is easy to lock yourself out of your network device and if/when this happens (use the waiting time checking the PC's ip settings - try release/renew the dhcp lease if not ok):
- First: Wait some minutes - it might just be a temporary glitz.
- Second: Try to restart the device, because it might just be a device service that need to be restarted.
- Last resort: Restore to the firmware defaults by resetting the device.
[edit] Internal network services
The software services are serviced by the network processor (ARM, MIPS...). Please note that the possibilities are limited by the software implementation and hardware.
List of non-exhaustive internal software services:
- Network traffic services:
- OSI layer 2 interconnection - ethernet address routing; a (software) bridge or switch - Definition: A two port switch is a bridge - a traditional bridge has two ends - not three or more ;-).
- OSI layer 3 interconnection - ip address routing; a (software) router
- OSI layer 2 interconnection and 2-4 moderation, ethernet transparent/bridging firewall
- OSI layer 3 interconnection and 2-4 moderation; ip packet filtering firewall
- Please note that the (above) (DD-WRT) firewall normally inspects higher OSI layers. Iptables can refer to modules that can do that:
- OSI layer 2-4 moderation; ip statefull firewall
- OSI layer 2-7 moderation; proxying/application/deep packet inspection firewall
- Quality of Service
- NAT - Network Address Translation
- Transparent web proxy
- (Inter)network client or server services:
- Network related server services:
- Management server services:
- Other server services:
[edit] Software network interfaces
The software network services is connected by you, to physical or logical network interfaces. The interfaces might be a:
- physical interfaces might be labelled eth0, eth1...
- logical might be a bridge (=switch) labelled br0, br1...
- logical vlan labelled vlan0, vlan1....
and maybe:
- teql0 - load sharing device I believe this is used for the "Link Aggregation on Ports 3 & 4" option on the Setup/Vlans page.
- imq0,1 - QOS device or IMQ Device
Refer to the DD-WRT Wiki Page default internal device networks for illustrations of current and pre-N device mappings and a more in-depth description of vLan, port and bridge assignments.
.
[edit] Examples of changed internal network
There are examples of how to move the wireless acces point on a separate vlan, so it can be separately firewalled:
- Separate LAN and WLAN (GUI)
- V24: WLAN separate from LAN, with independent DHCP
- WLAN separate from LAN, with independent dhcp, etc
There are examples of how to assign a wired LAN port to some vlan different from the rest of the LAN ports:
- VLAN Detached Networks (Separate Networks With Internet Access)
- VLAN Detached Networks (Separate Networks With Internet)
There are examples of how to have more than one ssid on the wireless acces point:
Combinations of the above: