[Q] How to disable dhcpd? - Galaxy S II Q&A, Help & Troubleshooting

Hi,
I have an I9100 running Android 2.3.3 XWKDD which I have rooted. I have installed wpa_supplicant version 0.6ah so the phone now recognises adhoc networks. I have used the wifi settings menu to set a static IP address and and netmask. I have not set values for the gateway or DNS servers because I don't need them.
My problem is that when I connect to any network (including the adhoc network) the phone does NOT use the static IP address but tries to get an address using DHCP and keeps looping. I have tried killing dhcpd and then setting the ip address and netmask manually and this allows me to ping other devices on the network. However, the wireless interface is periodically reset and dhcpd is restarted.
Is there a way of disabling dhcpd or getting the phone to use its static IP settings?
N10

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DNS Problems After Bell 2.3.4 Update

So when I was using 2.2.2 my WIFI connection was working flawlessly with DHCP setting my wireless settings.
I flashed 2.3.4 using NFHimself's Gobstopper without any errors, did a factory reset afterwards and I get an internet connection over mobile with no problems, however on my home WIFI network w/ DHCP (on which 2.2.2 worked fine), it cannot resolve addresses past my router (can browse to the router config fine). Now if I set a static IP and the DNS servers manually, it works over WIFI, however when the WIFI radio turns back on from sleeping it gets stuck at obtaining an IP address.
So I tried leaving it with DHCP giving me an IP address, and then using Set DNS to use google's DNS servers instead of my router's IP, and it seems to work in all situations, however it leaves me unable to browse my LAN (even when one dns domain is left as my local domain server).
I installed Network Monitor II to watch my wireless settings for the three setups:
For just using DHCP, the DNS servers are both set to my router's IP
For static settings, the DNS servers are whatever i set them however i cannot browse my LAN when one is left as my router's IP
For DHCP w/ a custom DNS, it is the same as using static settings
Not sure whether to think this is a problem with the update, or a problem with my router (however no settings were changed before or after the update on it). Anyone have any ideas?
Router: Linksys WRT54GL running DD-WRT
I read somewhere that having the "Filter WAN NAT Redirection" setting enabled in DD-WRT causes this sort of behavior on some mobiles, it is not enabled.
Only thing I could find that I thought it might be is Android Bug Issue 10315 (to which I cannot post a link as I lack sufficient posts... so far), but am still unsure
I should also note that I have two routers (both identical), but only one deals with the DHCP and DNS, the other is more just a wireless AP. Thus, all of my lan is on 192.168.1.*, including both routers ( x.x.x.1 and x.x.x.2 ). uDHCPd is my DNS server on my router, but I might try dnsmasq in the next couple days.
Jiraffe said:
So when I was using 2.2.2 my WIFI connection was working flawlessly with DHCP setting my wireless settings.
I flashed 2.3.4 using NFHimself's Gobstopper without any errors, did a factory reset afterwards and I get an internet connection over mobile with no problems, however on my home WIFI network w/ DHCP (on which 2.2.2 worked fine), it cannot resolve addresses past my router (can browse to the router config fine). Now if I set a static IP and the DNS servers manually, it works over WIFI, however when the WIFI radio turns back on from sleeping it gets stuck at obtaining an IP address.
So I tried leaving it with DHCP giving me an IP address, and then using Set DNS to use google's DNS servers instead of my router's IP, and it seems to work in all situations, however it leaves me unable to browse my LAN (even when one dns domain is left as my local domain server).
I installed Network Monitor II to watch my wireless settings for the three setups:
For just using DHCP, the DNS servers are both set to my router's IP
For static settings, the DNS servers are whatever i set them however i cannot browse my LAN when one is left as my router's IP
For DHCP w/ a custom DNS, it is the same as using static settings
Not sure whether to think this is a problem with the update, or a problem with my router (however no settings were changed before or after the update on it). Anyone have any ideas?
Router: Linksys WRT54GL running DD-WRT
I read somewhere that having the "Filter WAN NAT Redirection" setting enabled in DD-WRT causes this sort of behavior on some mobiles, it is not enabled.
Only thing I could find that I thought it might be is Android Bug Issue 10315 (to which I cannot post a link as I lack sufficient posts... so far), but am still unsure
I should also note that I have two routers (both identical), but only one deals with the DHCP and DNS, the other is more just a wireless AP. Thus, all of my lan is on 192.168.1.*, including both routers ( x.x.x.1 and x.x.x.2 ). uDHCPd is my DNS server on my router, but I might try dnsmasq in the next couple days.
Click to expand...
Click to collapse
I did flash NFHimself's ROM without any issues. My wireless LAN was working fine. Did not noticed any issue on my side. Try with another Wireless router without all the setup you've done. Pretty sure the issue is with your routers.
I don't understand why you are not able to reach you LAN with google's DNS configured...? Do you have some sort of DNS entry specific to your LAN configured into your router?
the problem seemed to solve itself when i switched my router's DNS server daemon from UDHCPD to dnsmasq.
And I couldn't reach my lan when i had both dns servers forced to google's servers as google's servers don't know how to route to addresses inside my lan. But that's not a bug, that is how it is supposed to work.
Good !
Sent from my MB860 using xda premium

[Q] WiFi: DHCP request although static IP configured

I face a strange behavior while connecting to WiFi.
When I configure the WiFi settings to use a static IP at home with a Speedport router from Telekom everything works fine. I get a connection imediately. (Security credentials are WPA2-PSK/AES).
But when I try to connect to a Cisco environment (1142 access points with 5508 controller with the same security credentials as at home) after PSK authentication the phone start with DHCP requests instead of using the configured static IP and I don't get a connection.
First I thought it was of the ROM or the device but I tried different ROMs (stocks and customs) and different devices (Defy and Galaxy S). Everytime the same thing.
A laptop or an iPhone can connect without any problem using a static IP.
It seems that the controller or AP sends something to the phone telling it to ignore the staic IP settings...
Strange!!!

wifi DNS ip???

when ever i give th ip in the wifi network the sgs2 automatically save the ::1 ip in dns 1 and there is no internet please help me to solve this problem
Sorry, neither do I understand the title nor what your exact problem is
What do you mean by "i give the ip in the wifi network"? Are you trying to give your phone a fix IP address?
What do you mean by "sgs2 automatically save the ::1 ip in dns 1"? Do you mean the property for DNS1 is set to "::1"?
Normally, when using Wifi, you're using DHCP, and the DNS server is provided by the DHCP server.
So you should check the settings on your wifi access point.
I use the Google DNS (primary 8.8.8.8, secondary 8.8.4.4) and adjusted my access point to use that so that all of my DHCP clients also use it.

[Q] Android unable to connect to my Wi-Fi network - Windows can

I am in university halls of residence. I have setup a Wi-Fi hotspot in my room using a generic router by connecting from the ethernet out port in the wall to a ethernet LAN port and disabling DHCP on the router.
This works perfectly for my Windows 7 laptop. It connects to the router and then to the uni internet without issues. However, although my Samsung Galaxy S3 (International i9300) can detect the network, if I just try to connect to the network as I would any other it gets stuck when obtaining an IP address. After messing around with it for a bit i found that I could get the phone to connect by going into the advanced settings and choosing "static" instead of "DCHP". I don't know what I was really meant to enter for IP Address, gateway, subnet, DNS 1 and DNS 2.
The router has the IP of 192.168.1.1 when i connect it directly to my laptop via ethernet so I tried that as the gateway, I set the IP address to something like 192.168.1.14 (So that it was similar but different), I set the subnet to 255.255.255.0 and the DNS servers I used google's (8.8.8.8 and 8.8.4.4). This got me connected to the router but there doesn't appear to be any internet connection.
I therefore thought that I had entered wrong information for the network (I was only guessing after all). Therefore I went into ipconfig in Windows and copied the default gateway and DNS servers and used a similar IP address (Last number different). I had the same issue.
Does anyone have any suggestions?
I only want Wi-Fi in my room for mobile.

Trying to understand the source of WiFi DNS

All,
I am aware of the various apps for changing DNS server settings - that is not the question. I would like someone to explain how the default values are being set.
My home wireless access point supports three SSIDs and I have SSID_1 bridged to my router. Within the router, I have defined 1.1.1.1 and 208.67.222.222 as my DNS servers. When my phone (Pixe3 3XL) is connected to SSID_1, however, it shows the DNS servers as being 8.8.8.8 and 64.6.64.6. (FYI - I just rebooted my router in case that might have an impact, but ti didn't.)
However, when my phone connects to SSID_2, which is not bridged to the router, the DNS shows up as 10.255.224.1, which is the gateway address.
Oddly, my desktop PC, which gets it IP via DHCP (the address is reserved) and was configured for automatic CNS, also showed the DNS servers as being 8.8.8.8 and 64.6.64.6.
I logged into my cable modem, but there are no user adjustable settings there.
So, from whence come these DNS IP addresses?

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