liksys WRT54G

Sun Oct 19 09:44:11 MST 2014

I got a problem. I'm trying to update it but can't get into the
configuration page (192.168.1.1). I tried resetting the device (I depressed
the reset button for 65 seconds) but to no avail. Any ideas?

:-)~MIKE~(-:

On Sun, Oct 19, 2014 at 12:52 AM, Michael Butash <michael at butash.net> wrote:

>  Vlan isolation, inside and outside for simplest of terms.  Vlan 1 is
> inside, Vlan 2 is outside.  By nature, one cannot reach another, thus
> Virtual LAN's.
>
> In the middle sits a bridge, and iptables mangles packets between them.
> This is your nat, firewall, application inspection, etc.
>
> A process on the wan grabs a dhcp address, adds it outside, and a default
> route to the upstream dslam or cmts.  It also registers it as the external
> address to nat your internal traffic as to the world, effectively hiding
> your internal routable subnets.
>
> The inside vlan uses a private address, usually 192.168.1.1/24 by
> default.  This gives you 253 usable address, and gives out a subset of that
> via dhcp.  When clients come up wired or wireless, they get an address from
> the dhcp server when they broadcast for an address.
>
> Routers usually bridge the wireless 802.11 radio(s) to this vlan as well,
> bringing them all into the 192.168.1.0/24 subnet on that vlan.  The DHCP
> server gives wired or wireless clients a local 192.168.1.0/24 address out
> of the subset it hands out, including the gateway for the subnet (itself,
> 192.168.1.1), and dns servers for it, again itself.
>
> They get a local dns server that is usually dnsmasq running on the router,
> caching and forwarding to the upstream provider dns servers given
> externally to the router when it gets its WAN address.  It forwards your
> requests on mostly.
>
> Wireless does some form of security, hopefully, letting client onto the
> ssid with a pre-share key or some other.  No wpa1, only wpa2+aes.  Tkip is
> exploitable, so is wps pin registration (easily crackable without
> mitigation routines).
>
> Most routers these days use dd-wrt, or some variant, usually some oem
> abomination hack of linux.  Your wrt54g is like the granddaddy of dd-wrt
> routers, see what generation it is and see if it's upgradable.  Probably
> doing yourself a favor upgrading the 10yr old firmware to something secure
> anyways, keeping some foreign entity from redirecting your dns for bank
> servers to snatch your credentials.
>
> Clear as mud?  Google lots of those words.
>
> -mb
>
>
>
> On 10/19/2014 12:31 AM, Michael Havens wrote:
>
> so the port I'm wondering about is an input port then. I thought I read
> that it is also a wan part.  How does that work? Like I know the internet
> is a wan but how does it work in this case?
>
>
> :-)~MIKE~(-:
>
> On Fri, Oct 17, 2014 at 10:27 PM, koder <iscreamkid at gmail.com> wrote:
>
>>  Mike,
>>
>> I have the same device in my networking system. My answer may not be 100%
>> correct, but here is my SWAG:
>>
>> The device was designed to serve as a router with DHCP server
>> capabilities, in other words it hands out IP addresses to requests that
>> come from one of the output ports.
>>
>> You can access the device using its web page and turn that feature off,
>> it then acts as a bridge router and the DHCP functioning will come from
>> further upsteam, from your other router.
>>
>> The network will not function correctly if you have two different devices
>> trying to pass out IP addresses using DHCP. Everything pretty much quits
>> talking to each other.
>>
>> While I have never tried using the device by plugging everything only
>> into the output ports, I am guessing that connection setup would use the
>> device as a bare dumb switch. No more double DHCP, only happy connectivity.
>>
>> I am reasonably sure my explanation is not technically correct, but is
>> functional. I was quite loose with input, output, upstream, and  downstream
>> analogies, but that is the way I think of them.
>>
>> By the way on a separate item, it is my understanding that most of these
>> devices are hacked and infected and should be either upgraded, or replaced.
>> I have yet to do either, but I think that is the case.
>>
>> HM
>>
>>
>>
>> On 10/17/2014 03:08 PM, Michael Havens wrote:
>>
>>  That is the router I have. On the back there are 4 LAN ports and
>> another port labled Internet. My setup had the cable from the modem feeding
>> into that port and everything worked until a couple of days ago. Today I
>> switched that cable to a LAN port and everything worked again. I asked in
>> another thread the purpose of the internet port and MR Butash gave me an
>> answer but it is still a lot hazy. In my research to answer the question
>> myself I found a wikipedia article that states:
>>
>>  The original *WRT54G* was first released in December 2002. It has a 4+1
>> port network switch <https://en.wikipedia.org/wiki/Network_switch> (the
>> Internet/WAN port is part of the same internal network switch, but on a
>> different VLAN <https://en.wikipedia.org/wiki/VLAN>).
>>
>>  My questions: What is that port for if not to be an input port for the
>> internet
>> and
>> Why was it working as an input port for the internet and why did it stop
>> working as such?
>> :-)~MIKE~(-:
>>
>>
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>
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