D-Link Wireless Routers for Home and Small Business > DIR-842

DIR-842 strange dhcp ip release

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Hi there,
Had the strangest problem today. DIR-842 used to work properly and all of a sudden trying to connect to it via wireless, assigned other ip to my phone than specified in the dhcp settings. If i kill the wifi connection on my phone and try several times to reconnect sometimes i get the correct ip.
To be more specific, under dhcp i set the router to assign addresses from over wifi and over the lan. On the newtork ip's are ok meaning that all pc's get ip from this only class. Phones/wireless devices sometimes get ip's from class . How in the world and from where does my router assign an ip from another class considering that everything is set manually on the router.
Any ideeas please? Maybe i am missing something, though never saw such weird thing so far. Might be a faulty router maybe ?
Thanks alot.


* What Hardware version is your router? Look at sticker under the router case.
* Link>What Firmware version is currently loaded? Found on the routers web page under status.
* What region are you located?
Internet Service Provider and Modem Configurations

* What ISP Service do you have? Cable or DSL?
* What ISP Modem Mfr. and model # do you have? ? or

Not sure if this is a bug or something that router may not support fully. I presume .5.5/24 should work ok.

What happens if you change to or .0.1/24?

Hi there,
Thanks for ypur reply.
Honestly can't remebber HW version because the router is located far from my location, software version is the latest because i've checked that. It's connected to a ISP router using a fiber connection, location Romania.
Interesting suggestion trying to use 0.1 or 1.1 classes but didn't see why i might do that because i never came across such a "glitch" where a router could assign other ip's instead of what it is "told" to assign. Never came accross a situation after having installed tens of routers and honestly didn't even cross my mind to try. Might worth giving it a try. Anyways, my client opted for a second internet connection for backup purposes and i've decided to order a dual wan router and set this wireless one up only for guest wireless connections or will send it back under warranty.
Thanks alot for your time.

Well if your using a modem/router combo, this could be an issue as well. Some modem/routers use .1 or .0 IP addresses for there configurations. If the DIR was set up by the wizard, it should have picked a 10.0.0.# ip address for its LAN side pool.

Let us know if using any of the other IP strings doesn anything different.

* If the ISP modem has a built in router, it's best to bridge the modem. Having 2 routers on the same line can cause connection problems: Link>Double NAT and How NAT Works. Call the ISP and ask to see if the ISP modem can be bridged. To tell if the modem is bridged or not, look at the routers web page, Status/Device Info/Wan Section, if there is a 192.168.0.# address in the WAN IP address field, then the modem is not bridged. If the modem can't be bridged then see if the modem has a DMZ option and input the IP address the router gets from the modem and put that into the modems DMZ. Also check the routers DHCP IP address maybe conflicting with the ISP modems IP address of Check to see if this is the same on the ISP modem, and if modem can't be bridged, change the DIR router to or .0.254.

The ISP's router assigns an ip like 192.168.1/ on the network. For the wan port on my dlink used an ip given my the ISP router like For the newtork i used 192.168.5/.
I can't access the ISP's router because it is denied. I have to phone them and let them know what changes i need and they will make those changes within 24 hours. So i'm in a huge dissadvantage because i cannot conduct tests and different setups on the fly. What made me wtite and ask things is that i have several dlink routers deployed, same firmware, model, HW version and so on and same ISP with the routers but it is the only place where i have this issue.
Thanks alot for your time.


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