en:troubleshooting:debugging_your_internet_connection
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en:troubleshooting:debugging_your_internet_connection [2022-08-05-16-02] – [DNS does not Resolve] 7saturn | en:troubleshooting:debugging_your_internet_connection [2022-08-07-21-17] – sw | ||
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If you cannot reach the Google DNS server, your internet connection may indeed be down. But that must not be the case. (Yes, Google may also be down, but that is very unlikely. So we just assume it is not down.) Head on to the next step. | If you cannot reach the Google DNS server, your internet connection may indeed be down. But that must not be the case. (Yes, Google may also be down, but that is very unlikely. So we just assume it is not down.) Head on to the next step. | ||
==== In Which Direction Is the Internet, Please? The Standard Gateway ==== | ==== In Which Direction Is the Internet, Please? The Standard Gateway ==== | ||
- | You could not reach the Google DNS via its IP address but others don't seem to have you initial problem. The next step is finding out, whether the Internet connection is down, or something else along the way to the internet. If you for example cannot reach your own router (which routs the internet traffic to your computer and vice versa), you of course cannot reach the internet either. In order to find out, what's going wrong, enter this into the cmd: | + | You could not reach the Google DNS via its IP address but others don't seem to have your initial problem. The next step is finding out, whether the Internet connection is down, or something else along the way to the internet. If you for example cannot reach your own router (which routs the internet traffic to your computer and vice versa), you of course cannot reach the internet either. In order to find out, what's going wrong, enter this into the cmd: |
'' | '' | ||
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If the gateway does //not// respond or is not set (even after checking all hardware is plugged in and you have a wireless connection), | If the gateway does //not// respond or is not set (even after checking all hardware is plugged in and you have a wireless connection), | ||
==== My Little Island (Wrong IP Configuration) ==== | ==== My Little Island (Wrong IP Configuration) ==== | ||
- | You do have an IP address, but it leads nowhere. This is usually the case, when someone™ messed with the IP configuration locally. Check whether your IP configuration is set to automatically receiving an IP address (in opposition to setting it manually). You can see this by opening your settings and select //Network & Internet//: | + | You do have an IP address, but it leads nowhere. Or resolving domain names to IPs does not work. This is usually the case, when someone™ messed with the IP configuration locally. Check whether your IP configuration is set to automatically receiving an IP address (in opposition to setting it manually) |
{{ : | {{ : | ||
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The greyed out elements are the network cards currently deactivated. If you find, that your LAN or W-LAN adapter is actually just deactivated, | The greyed out elements are the network cards currently deactivated. If you find, that your LAN or W-LAN adapter is actually just deactivated, | ||
- | When right-clicking and selecting // | + | When right-clicking and selecting // |
{{ : | {{ : | ||
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'' | '' | ||
- | This tries to resolve the domain name // | + | This tries to resolve the domain name //< |
{{ : | {{ : | ||
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If this works, your general internet connection setup is actually OK, but the configured DNS server to be used by your computer may be faulty. Either there is a DNS server manually configured, that does not respond any longer. If so, remove the manual configuration (see section [[#My Little Island (Wrong IP Configuration)]] on a very similar matter). Usually the DNS server to be used is provided by your router at the same time, your client gets its IP address assigned by the routers DHCP server. So getting it automatically should usually be fine. Or the DNS server has a problem itself. | If this works, your general internet connection setup is actually OK, but the configured DNS server to be used by your computer may be faulty. Either there is a DNS server manually configured, that does not respond any longer. If so, remove the manual configuration (see section [[#My Little Island (Wrong IP Configuration)]] on a very similar matter). Usually the DNS server to be used is provided by your router at the same time, your client gets its IP address assigned by the routers DHCP server. So getting it automatically should usually be fine. Or the DNS server has a problem itself. | ||
- | When everything works now, you are done. | + | If nothing gets resolved, head on to the next stop. |
- | If everything works just like charm (pinging //< | + | If everything works just like charm for the test case provided here (pinging //< |
===== The Lost Phone Book: DNS Problems ===== | ===== The Lost Phone Book: DNS Problems ===== | ||
- | So you have used the standard DNS configuration, | + | So you have used the standard DNS configuration, |
{{ : | {{ : | ||
- | If there is no block with information like '' | + | If there is no block with information like '' |
- | If you do find entries here, redo the step '' | + | If you do find entries here, redo the step '' |
- | But if you prefer another DNS provider, you may of course use another one. Just be aware: Resolving domain names is a sensitive thing. Anyone who runs a DNS server will know which domains you try to connect to (as usually this is the first step before | + | **Just be aware**: Resolving domain names is a //sensitive// thing. Anyone who runs a DNS server will know which domains you try to connect to (as usually this is the first step before |
==== Am I Listening to Myself? IP Stack Damaged ==== | ==== Am I Listening to Myself? IP Stack Damaged ==== | ||
So not even your own router does answer, you get no IP and it does not seem to be the hardware. Maybe there' | So not even your own router does answer, you get no IP and it does not seem to be the hardware. Maybe there' | ||
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If your computer does answer to itself, then the computer is (usually) just fine. So it's either the router, that does not answer, or you still have a configuration problem of your IP settings. It may also be possible, that you have to configure your IP connections manually. But that usually is done by someone managing your network. So you will have to refer to that person. | If your computer does answer to itself, then the computer is (usually) just fine. So it's either the router, that does not answer, or you still have a configuration problem of your IP settings. It may also be possible, that you have to configure your IP connections manually. But that usually is done by someone managing your network. So you will have to refer to that person. | ||
===== DNS Resolves, Still no Luck ===== | ===== DNS Resolves, Still no Luck ===== | ||
- | There is still one other direction this can go. You can open //< | + | There is still one other direction this can go. You can open //< |
===== Router Accessible but Still no Internet Connection ===== | ===== Router Accessible but Still no Internet Connection ===== | ||
So your router responds and the web interface is accessible, but the internet connection still refuses to work. This is usually a problem of your ISP. You may have to live with it, until they fix it. If it does not go away, even after a few hours, try contacting your ISP on the problem. Usually it is nothing you can influence. Worst case scenario: The wiring of your home or of your carrier is defective, which requires a technician to fix the problem. Or the Router is damaged, and needs to be replaced. | So your router responds and the web interface is accessible, but the internet connection still refuses to work. This is usually a problem of your ISP. You may have to live with it, until they fix it. If it does not go away, even after a few hours, try contacting your ISP on the problem. Usually it is nothing you can influence. Worst case scenario: The wiring of your home or of your carrier is defective, which requires a technician to fix the problem. Or the Router is damaged, and needs to be replaced. | ||
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en/troubleshooting/debugging_your_internet_connection.txt · Last modified: 2022-08-10-20-30 by sw