I'm having an odd problem with my Windows Phone (Lumia 640).
I've been using a Linux server running dhcpd for my DHCP server for a while now and every device I've got in the house is happily getting their IP addresses from it (generally assigned via MAC address so that I know what is on what IP). However, my Lumia 640 was only intermittently connecting to the network, I went round the houses trying to work out what was going on, and in desperation I turned on my BT HomeHub's DHCP server and all of a sudden the phone would connect (on an IP served by the HomeHub).
My config on the DHCPD server is nothing exciting, and the IP addresses assigned are outside of the subnet so they don't clash with any dynamically assigned addresses. As I've said I have no troubles with the configuration for multiple devices (android, iOS, MacOS, Linux, Windows, SONOS), it's only the Windows Phone that has any issues.
Any ideas? Config below...
# defaults
ddns-update-style none;
option domain-name-servers 208.67.220.220, 208.67.222.222;
option subnet-mask 255.255.255.0;
option routers 192.168.44.1;
option broadcast-address 192.168.44.255;
option ntp-servers 192.168.44.254;
default-lease-time 600;
max-lease-time 7200;
# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
authoritative;
# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;
# No service will be given on this subnet, but declaring it helps the
# DHCP server to understand the network topology.
#
#subnet 10.152.187.0 netmask 255.255.255.0 {
#}
# This is a very basic subnet declaration.
subnet 192.168.44.0 netmask 255.255.255.0 {
authoritative;
range 192.168.44.50 192.168.44.79;
}
# Lumia 640
host russphone {
hardware ethernet **MAC address here**;
fixed-address 192.168.44.3;
}
I discovered that my router (a BT HomeHub 5) was still sending out DHCP offers despite the server being turned off. Resetting it fixed the problem, not sure why the server was still running, or why certain devices were consistently affected (my phone and my networked printer) and other completely unaffected.
Related
I'm doing some Ruby on Rails development on a WSL 2. The rails app connects to a MySQL server running on my Windows host. When I used WSL 1 it as easy to set the host to 127.0.0.1 but on WSL 2 I have to use the nameserver written in /etc/resolv.conf
But I found out that IP address written in resolv.conf changes on reboots.
Is there a way to set a static IP address for WSL 2 ?
You can consider ocroz/wsl2-boot (see INSTALL for installation instructions)
After running wsl-boot command:
The WSL network is configured as per its predefined definition always (Windows side),
All WSL hosts are configured with their predefined static IP always (Linux side),
All WSL hosts and connected Hyper-V VMs can talk to each other always,
The DNS resolution works however you are connected to Internet or VPN,
You can SSH to WSL host without any delay.
Dec. 2022, microsoft/WSL issue 4210 also adds:
With the latest Windows 11 (22621+), you can already specify the network adapter you want to use for WSL2 in .wslconfig:
[wsl2]
networkingMode=bridged
vmSwitch=my-switch
ipv6=true
So, now you can create a Hyper-V external virtual switch for WSL2 and fix the IP address, no other scripts are required. It works out-of-box.
The same thread adds:
Create a vSwitch in Hyper-V，I Use Hyper-V Gui to do this. Hyper-V has three types of virtual switches -- external, internal, and private.
I choose the "external" type , which is bridge type, the same as VMWare workstation.
set this config in .wslconfig
I find the IP change to the network of my home router，which is replace the old of eth0.
You can set DHCP in you home router, then Fix the IP of the bridge.
To sum up, in the case of bridge, it is essentially DHCP , and whether it is fixed or not depends on the DHCP server.
If you don't want /etc/hosts, /etc/resolv.conf to change after restart, you can create
/etc/wsl.conf
[network]
generateHosts = false
generateResolvConf = false
I'm tring to test my Windows Phone 8 app on an actual device, but I need the IP Address of my computer in order to do this. When I type 'ipconfig' in the command prompt, it shows two different IPv4 addresses and I can't tell which is the correct one for my computer that will allow me to test the app on a device.
Command Prompt Output:
Ethernet Adapter vEthernet <Internal Ethernet Port Windows Phone Emulator Internal Switch>:
IPv4 Address......: 169.254.xx.xx
Ethernet Adapter vEthernet <New Virtual Switch>:
IPv4 Address......: 192.168.x.xxx
I'm having a heck of a time getting this app to actually work on a device so if there is anything you see that is off, by all means let me know. My concern in this question though, is which of these is the true IP Address of my computer?
The one starting with 169.254 you can safely ignore. If a device does not receive an IP from any DHCP server within a few seconds, it creates its own, starting with 169.254.x.x, but you can't reach anything with such an IP, nor can anything reach your device.
The second one is the real one in your case. 192.168.x.x means you are part of a private network (but it could also be 10.x.x.x).
If you see multiple IPv4 addresses listed in command prompt as a result of ipconfig command, then the IPv4 address that has Default Gateway is your main or current device or computer IPv4 address.
The first one is your computer's IP address, the second one is for application or OS virtualization.
I had to reset my router and modem, after a 3 hour task of getting those working properly again I can connect to the internet.
I had WordPress running locally on MAMP and the IP address I'd connect to was http://192.168.1.141:8888, now I can't access this address at all locally, the page never properly loads. http://localhost:8888/MAMP/ does load, I can access phpMyAdmin, start page etc.
However localhost:8888 sort of 'half' loads? I can see the title of the site I have running locally in the browser tab and at the bottom it says 'connecting to http://192.168.1.141:8888' but it never loads properly.
Restarted MAMP, cleared browser cache, restarted computer etc, nothing fixes it.
While 192.168.1.141 is the address you used to connect to, after resetting your router and modem, depending on how your router assigns IP addresses (statically or dynamically), your IP address may have changed.
How to check your ip address on Windows:
Click start menu
type in cmd.exe
type ipconfig into the terminal
your ip address should be listed in the results
#gilsho: ifconfig is the *nix command, MAMP I think stands for Microsoft / Apache / Mysql / PHP.
Correction: #gilsho: you are right. MAMP is Mac, so you would use ifconfig.
http://en.wikipedia.org/wiki/MAMP
Once you confirm your ip address, we can continue to help you.
Edit: To make things easier for you, I would go into your router (usually 10.0.0.1 or 192.168.0.1) and set up your ip address to a static one (they usually make it easy for you; your mac address can be found in the ipconfig results, just assign the mac address to an ip address in the range it assigns you. That way, the router will always give you the same ip regardless of whether it is restarted or not.). This will not mean you can access your webpage outside of your router network though.
Edit #2:
Try using a simple index.html (maybe your apache comes with one) that you can try loading. Perhaps it is your webpage that bricks something while loading. In any case, it's best to simplify the problem. If you can load a simple html "hello world" page, then it's likely a problem with your code.
Edit #3:
Is your webpage using any additional technologies? You have PHP, Python, Ajax/jQuery, etc. etc. If one of these components or plugins is missing or not configured, you may also see problems such as loading issues, 405/500 errors, etc.
Routers typically use DHCP to hand out local IP address to host machines. I suspect that when you restarted your router your machine received a different IP address. In order to find your new IP address, run:
ifconfig
from the command line. The output should look something like this:
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether c9:a4:51:43:5b:1b
inet6 fe80::bae8:56ff:ae23:5c1a%en0 prefixlen 64 scopeid 0x4
inet6 2601:9:400:1185:bae8:56ff:fe43:5b1a prefixlen 64 autoconf
inet6 2601:9:400:1185:fdcd:395b:4671:7cbf prefixlen 64 autoconf temporary
inet 192.168.1.113 netmask 0xffffff00 broadcast 192.168.1.255
nd6 options=1<PERFORMNUD>
media: autoselect
status: active
search for the inet field, that's your current local IP address.
Ok well that took FOREVER to fix, but after I managed to reset my router and set all that up again I decided to use manual DHCP and just changed it back to my old local IP.
God, working with any equipment you get from an ISP is a nightmare.
This is my scenario,
I have a Ubuntu 12.10 host and a win 7 guest installed in the virtual box. The Network is configured to be NAT in the virtual box. I have a mysql sever installed in the Ubuntu with “bind_address” in my.cnf is commented out.
How can I access this mysql server from the windows 7 guest? I did some search in Google and came accross with this Host-Only Networking With VirtualBox but I cant get it work as I don't have statics IP with my internet vendor and my network knowledge is very bad. All I know is that I have DHCP enabled Internet connection. So if i do any IP's in the network settings I don't have Internet.
I know that there are plenty of solutions on the other way around (access the guest server from the host) but still cant figure it out.
So any help is appreciated.
Thanks
Your external IP being static or not has no bearing to accessing a virtualized server on your LAN.
Set VirtualBox to bridge mode.
Simply determine your computer's DHCP-selected internal IP (usually 192.168.1.SOMETHING) and replace the last number with another that is less than 250. For example, if your computer was 192.168.1.6, 192.168.1.70 would work fine on the VM(pick a high number to void conflicts).
Set it by using the control panel->adapter settings. Reboot the VM. Connect to MySQL at 192.168.1.70(or the address you picked earlier).
Note: If your computer's address is in a different subnet (192.168.0.XXX, 10.XX.XX.XX, etc) change the last number and keep the first numbers the same as on the host.
Is there a performance difference between TCP connections to:
localhost / 127.0.0.1
a domain which resolves to the local machine
Or more specifically, do the latter connections go through the loopback device, or over the actual network?
The reason I'm asking is I'm thinking about changing database settings in many PHP apps so they use a full domain instead of localhost. That way we could more easily move the database to a different server, if the need arises.
This is implementation and operating system dependent. On Windows, anything connecting to a local IP address, even if it is an outside-facing IP, will go over loopback. This is a documented problem for applications such as packet sniffers, because you can't sniff the loopback. (Windows doesn't treat loopback as a "device" -- it is handled at the network level.) However, in this case it would work in your favor.
Linux, in contrast, will follow whatever you have in your routing table, so packets that are destined to your local machine will go to your local machine over the network if the routing table isn't properly configured. However, in 99% of the cases the routing will be configured properly. Your packets won't go over the loopback device, but the TCP/IP stack will know that you are contacting a local IP and it will virtually go out and back in the proper ethernet device.
In a properly configured environment, the only bottleneck for using a domain name would be DNS resolution time. Contacting an outside DNS can add additional latency into your configuration. However, if you add in the domain name into your /etc/hosts file (C:\Windows\System32\drivers\etc\hosts on Windows), your system will skip the DNS resolution phase and obtain an IP directly, making this time cost moot.
That depends on how the names are resolved. The procedure is typically /etc/hosts first and then DNS if that fails. If localhost is in your /etc/hosts, putting whatever.wherever in the file as well will make it resolve with the same speed.