I had an old Linksys E1200 on hand. Things looked a little bleak as the OpenWrt site seemed to indicate there were some issues. However the router noted there was apparently slightly different than mine (I have the Cisco logo) so I thought I'd give it a try.
At the bottom of the Linksys TechData page I found a link to the OpenWrt firmware: openwrt-15.05-brcm47xx-mips74k-linksys-e1200-v2-squashfs.bin and downloaded it (there are other downloads here in case you don't have a V2, etc). Install was easy from the stock Linksys firmware. I was able to easily telnet to IP 192.168.1.1 - a fixed address when plugging the router into my test network, not via DHCP. This also meant it had no clue as to DNS, default router, etc. Surprisingly LuCI came pre-installed with the bin image. I still edited the config file manually.
You'll probably need to use vi to edit the config files if you don't use LuCI:
I added only 2 lines to the /etc/config/network file - the gateway and dns settings:
i - to insert [esc] :qw - to same and exit
config interface 'lan' option ifname 'eth0.1' option force_link '1' option type 'bridge' option proto 'static' option ipaddr '192.168.1.1' option netmask '255.255.255.0' option gateway '192.168.1.10' option dns '220.127.116.11' option ip6assign '60'
Reload the network settings:
Try to ping google.com (or anything on the internet) from the router. If successful, install a few things:
opkg update opkg install nano # install nano if you don't know VI/VIM very well opkg install tcpdump # this is the important part that will be called remotely from you client wireshark
On your local Ubuntu:
sudo apt-get install wireshark sudo mkfifo /tmp/pipe sudo chmod 777 /tmp/pipe
Or on Windows WSL (Ubuntu on Windows 10):
Then for wireshark:
sudo apt-get install wireshark sudo apt-get install x11-apps export DISPLAY=:0 # you may wish you put in this your ~/.bashrc sudo pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY XDG_RUNTIME_DIR=$XDG_RUNTIME_DIR wireshark
It should look something like this. There's initially a failure message, but then a few moments later a password prompt. One you login, all the WiFi router packets should be forwarded to the your local network packet capture!
wireshark -k -i /tmp/pipe & ssh firstname.lastname@example.org "tcpdump -i any -s 0 -U -w - not port 22" > /tmp/pipe
0 $ wireshark -k -i /tmp/pipe & ssh email@example.com "tcpdump -i any -s 0 -U -w - not port 22" > /tmp/pipe  4709 Failed to connect to generic netlink. firstname.lastname@example.org's password: tcpdump: listening on any, link-type LINUX_SLL (Linux cooked), capture size 65535 bytes
For Windows 10 WSL: I downloaded XMing X-windows client. Be careful,there are a lot of fake download links there. If you know of a better place to download XMing or some other Windows X-windows client, please let me know. Despite being 8 years old - XMing seems to work well on Windows 10:
|Pinging google from local router|
|viewing local router traffic on remote WSL WireShark w/XMing|