[SATLUG] OT(?sorta) Linksys WCG200 - DHCP wrong (or bad) address
with routing and NAT turned on
horned0wl93 at gmail.com
Tue Apr 1 00:02:42 CDT 2008
Jennie Haywood wrote:
> On Mon, Mar 31, 2008 at 8:33 AM, ed <horned0wl93 at gmail.com> wrote:
>> > Thank you! What's interesting is that the reported DHCP server for
>> > that 66 network is at 192.168.5.4.
>> Likely correct, depending on the default factory spec internal IP
>> address of your router. 192.168.xx.xx is the block of IANA-assigned
>> addresses for a NATed Class C network -- what you would have inside your
> Yep... It's a private network.
>> router on your own network. (What is your router's IP internal address?
>> What is your ISP-assigned IP address?) Your router would be responsible
>> for assigning DHCP addresses within your network, and NATing them to
>> your external IP address.
> See that's what I find odd. The factory default on the Linksys
> WCG200 for a router DHCP server is 192.168.0.1 (at least that's what
> mine resets to when I reset it to factory defaults).
Ok. the WCG200 may have a different default gateway address than my
WTRG54S. Private NAT addresses aren't exactly as constrained as
public/corporate NATing. If it defaults to xxx.xxx.0.1, ya might wanna
let it be, unless you'd care to establish your own network parameters.
> How I found the 192.168.5.4 address was by turning OFF the routing and
> NATing on my Linksys and letting *their* DHCP set the info on a
> windoze box and looking at it with ipconfig /all.
Cute. Then one of my earlier suggestions may apply: you might have had
a rogue server injected somewhere in your up-channel network. Under the
best of conditions, some people's kids don't understand the need to
isolate their networks when experimenting with creating a server. If it
was an intentional hack, however...
> This morning it was down again. So I went thru the process of
> turning off the routing and NATing to let their (Grande's) DHCP setup
> the windoze box:
> IP Address. . . . . . . . . . . . : 18.104.22.168
> Subnet Mask . . . . . . . . . . . : 255.255.254.0
> Default Gateway . . . . . . . . . : 22.214.171.124
> DHCP Server . . . . . . . . . . . : 192.168.5.4
Obviously, we're NOT talking about YOUR router here... The DHCP server
in you list is definitely rogue...
> DNS Servers . . . . . . . . . . . : 126.96.36.199
> So I copied that to notepad and decided to see what would happen if I
> put the routing and NATing back on and let the router pick up a DHCP
> address. It came up with a 24.155.114.XXX address. Which *miracle of
> miracles* worked! So I guess they fixed whatever was whigging out
> with the DHCP.
Yeah, by switching over to one of Grande's alternate nets
(24.xx.xx.xx)... See below. Expect a switch-back sometime in the near
future, unless maybe they've undergone a net assignment change.
Grande Communications Networks, Inc. GRANDECOM-03 (NET-24-155-0-0-1)
Grande Communications SAN ANTONIO GRANDECOM-MARKET03
188.8.131.52 - 184.108.40.206
> Why couldn't the tech support guys just say there could be OR is a routing issue and we are looking into it???
> Why tell me that it's my hardware when I know full well it's NOT my hardware.
I dunno... Arrogance, your gender, any number of pig-headed reasons.
According to most ISPs, its never their problem, even if the building's
burning down around them. Go figure...
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