OCEAN CITY was a milestone release for late 2011. For more information
about its goals, see the OCEAN CITY page.
It would be a good idea to print out these instructions before
proceeding. If your router has already been flashed with Cerowrt
firmware, so you can proceed to Step 1 (“Configuring and Installing the
Step 0. Flashing the router
Please see the Cerowrt flashing instructions for how to
install the current CeroWrt build on your
bismark:Wndr3700v2 Router from your platform of choice
(windows, osx, linux).
Step 1. Configuring and Installing the Router
Power on your router. The router should boot in under
two minutes. It takes a lot longer the first time as it has to fully
check flash for errors. The router itself comes up on 172.30.42.1.
(NOTE RC6 and prior releases come up on .33!) The router serves
IP addresses on 172.30.42.0/27 networks by default. (see
Connect to your router. Plug in a laptop or computer to one of
the 4 LAN ports on the router, and refresh your laptop/computer’s
DHCP IP address. Alternatively, connect via wireless by setting your
SSID to “CEROwrt” (no SSID password) or “CEROwrt5”. Your machine
should get an IP address from the 172.30.42.0/27 subnet in the first
case, other networks in the second and third.
Configure your router’s default password. In your web browser,
go to the router configuration screen at http://172.30.42.1:81 (see
also bismark:why 81?). The default password
is ‘Beatthebloat’. Go to the System/Administration screen and enter
in a new password for the router. Write this password
down somewhere. The login will be “root”, and the password that
you set should be something difficult. Note you can also just go to
gw.home.lan for most things, once DNS is up.
Secure your wireless interfaces Go to the Network->Wireless
configuration page, and change the SSIDs of the various interfaces
to suit your liking. (See also FAQ)
Enable WPA2 encryption on the LAN interfaces, and if you wish your
guest interfaces to be secured, do the same there, too. Choose
unique passwords for the lan and guest interfaces.
Set your country. If you are not in the US, please set your
country for both radios to the correct country in order to ensure
SAVE and APPLY. At the bottom part of the Web interface, save
and apply the changes (these are two distinct steps).
Reboot the router. You will need to reboot the router for SSH
and the Internet to come up. Reboot and connect the WAN interface to
the Internet (i.e., to your DSL or Cable modem). Wait a few minutes,
and refresh your laptop/computer’s DHCP address.
Hopefully at this point you are on the Internet.
Important Configuration Notes:
The wireless interfaces are configured as open (no password)
by default. They are also set to the United States regulatory
wireless spectrum by default. You should address these issues
before connecting the router to the Internet.
QoS is turned OFF by default.(see
FAQ). You should address this issue
after connecting to the internet.
Step 2. Fine-tuning your QoS Settings
By default, the Ocean City release CeroWrt Router is configured for slow
Internet connections. See the FAQ for how to
set it appropriately for your network connection. This is a very
Changing your default IP addresses
We really don’t recommend you change the default network numbering unless you know what you are doing. Seriously. Don’t
mess with it.
But: If you wish to use other default IP addresses… we recommend
against using 192.168.0.1 and 192.168.1.1 for historical reasons. It
would be cool if you would co-ordinate with us on a 172.16.0.0/12
allocation|Bloat-net to make vpns easier to play with…
Go to the Network screen on the router and change to suit. By default
the secured interfaces come up on the 172.30.42.32⁄27 (33),
172.30.42.64⁄27 (65), 172.30.42.96⁄27 (97). addresses, and the guest
networks come up on 172.30.42.129 and 160 - the mesh network is disabled
by default.You will also need to change the firewall rules, the
/etc/xinetd.conf file and many files below /etc/chroot/named/etc/bind/
Important: If you change the default IP address, your Web interface
will change at this point to be whatever-you-chose:81 after doing a save
and apply, and you will need to change the url in your browser
We hope that your experience will be exceptional. Please send us your
feedback and comments by registering on the
wiki and posting to the
list. You can also file bugs and feature requests in our Bug