I want to use a D-Link ADSL2 router/modem ( DSL-2640B ) to sniff all network traffic (for a security audit. I don't have time to scan all machines there and I want to know if they are quiet or sending 10MB/s of sensitive data to some location ;) ).
There will be a net connection on LAN port 1 and a PC with a packet sniffer on port 2. I want it to copy (
-tee) all packets from wlan to port 2 while allowing them to pass to port 1 (where the gateway will be).
Since this router is NOT supported by dd-wrt, my best option is openwrt. I also have a DIR-635, but I really don't want to flash it since the network relies on it at the moment. I also have a DSL-2740B, but it's the same as this one but with two antennas.
I know it is possible to make a sniffing environment like this with
-tee. Is it possible to make the router treat LAN1 as a WAN instead of a DSL port? How? Is it possible on stock D-Link firmware?
Here is the list of available commands from SSH:
> help ? help logout reboot adsl atm brctl cat ethctl ddns df dumpcfg echo ifconfig kill arp defaultgateway dhcpserver dns lan passwd ppp remoteaccess restoredefault route save swversion wan ping ps pwd rip siproxd snmp sntp syslog sysinfo tftp wlctl wlan