Loose access to internet when I setup static IP

[cchisholm]

My goal is to control a headless rp3 from a win10 machine. by following these instructions (twice)...
https://raspberrypi.stackexchange.com/q ... 4428#74428
...I was able to successfully set the static IP and access it from VNC....but then things got strange.

Here is the output from ifconfig showing the proper IP address...

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wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.215  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::574d:3c4d:490a:6fb5  prefixlen 64  scopeid 0x20<link>
        ether b8:27:eb:ca:d8:e8  txqueuelen 1000  (Ethernet)
        RX packets 150  bytes 26452 (25.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 213  bytes 23242 (22.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I can ping the rp3 fine from the win10 machine. but now, I can't see the internet from the rp3 saying anything on the outside is "unreachable", and when I try to ping the win10 machine, it just sits there and does nothing...

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pi@RP3:~ $ ping 192.168.0.20
PING 192.168.0.20 (192.168.0.20) 56(84) bytes of data.

Apparently, I have left a step out or something, but not sure what.

Any suggestions??

BTW, I know I am terrible about laying out my question, so please ask if I am still not clear.
Charlie

[MaxVMH]

Maybe that IP address is already in use, can you try another one?

Also, don't forget to reboot afterwards.

[cchisholm]

I checked and there are only four machines on the network at the moment and I know the IP's on all.

I have rebooted several times since discovering this and the problem persists.

I am still trying to get my head around setting up a fixed IP in dhcpcd.conf rather than interfaces, so I figure I am doing something wrong there. The only thing I did was add the following at the bottom of dhcpcd.conf...

Code: Select all

interface wlan0
static ip_address=192.168.0.215
static routers=192.168.0.1
static domain_name_servers=192.168.0,1

this gave me the fixed IP but took away access to the internet.
Was there something else I needed to do?

[fbe]

You should add /24 to your ip address
You must replace the komma by a dot in the domain_name_servers ip address

[crchisholm]

You should add /24 to your ip address
You must replace the komma by a dot in the domain_name_servers ip address

I had added the /24 after posting, but didn’t see the comma until you pointed it out, but I have this same problem on two different RP3’s and I know the second one does not have that typo.

I will correct the comma, but I suspect the problem will persist since the second RP3 without the typo behaves exactly the same way.

[MaxVMH]

Try using only:

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24

And then reboot ofcourse. PS: why are you trying to use 192.168.0.1 as a DNS-server?

[pcmanbob]

why are you trying to use 192.168.0.1 as a DNS-server?

Some routers have provision for you to enter the DNS servers you want to use in their settings, you can then just point any PC or Pi at the router address for its DNS server and the router will redirect the request to the entered DNS servers.

cchisholm.

Try following the raspberrypi.org lesson on networking to set a static IP on your pi.

https://www.raspberrypi.org/learning/ne ... p-address/

[cchisholm]

Try following the raspberrypi.org lesson on networking to set a static IP on your pi.

https://www.raspberrypi.org/learning/ne ... p-address/

This is exactly what I did. Actually tried it on two different RP3’s and got the same result from both. One points back to the router for DNS (192,168.0.1) and the other points to 8.8.8.8, 8.8.4.4. In both cases, I have the static IP I want, but no access beyond the gateway.

Seems like there has to be another step I am missing.

[SurferTim]

Are you certain your router is at 192.168.0.1?

[RaTTuS]

go back to dhcp
what does it say when you do
ifconfig

[scruss]

go back to dhcp

Amen to that!

I dunno the fascination with static LAN addresses. We've been trying for decades to make the problem go away, and yet it comes up here all the time .

Two ways to get a predictable address without breaking DHCP:

1. In your router, bind specific MAC addresses to specific LAN addresses. It's not 100% reliable (what is?), but after the first reboot it's pretty stable.
2. Use mDNS/Avahi/Bonjour and change the hostname. It's a bit poor in a Raspberry Pi meetup where everyone's starting new machines for the first time, so too many raspberrypi.locals with the same password happen at once, but in RL this is less of a problem.

[SurferTim]

go back to dhcp

Amen to that!

I dunno the fascination with static LAN addresses. We've been trying for decades to make the problem go away, and yet it comes up here all the time .

Two ways to get a predictable address without breaking DHCP:

1. In your router, bind specific MAC addresses to specific LAN addresses. It's not 100% reliable (what is?), but after the first reboot it's pretty stable.
2. Use mDNS/Avahi/Bonjour and change the hostname. It's a bit poor in a Raspberry Pi meetup where everyone's starting new machines for the first time, so too many raspberrypi.locals with the same password happen at once, but in RL this is less of a problem.

Some of us need static IPs without using a router setup. Some of us have static IPs issued by our ISPs. Some don't have access to the router setup.

[cchisholm]

Are you certain your router is at 192.168.0.1?

Yes. Absolutely sure. Been that for years.

go back to dhcp
what does it say when you do
ifconfig

As i showed in my openning question....

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wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.215  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::574d:3c4d:490a:6fb5  prefixlen 64  scopeid 0x20<link>
        ether b8:27:eb:ca:d8:e8  txqueuelen 1000  (Ethernet)
        RX packets 150  bytes 26452 (25.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 213  bytes 23242 (22.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

scruss: I need fixed IP because I am using the RP3's headless with VNC and have a few other processes that count on the IP remaining stable. With DHCP, if somewhere down the line (it's happened often) the DHCP assigns a different IP to the RP3, i have to reconfigure VNC and a couple other processes to the new IP. As far as your other two suggestions are concerned, I'm afraid they are above my skill set.

[MaxVMH]

Can you try this on a fresh install?

Try using only:

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24

And then reboot ofcourse.

[cchisholm]

Can you try this on a fresh install?

Try using only:

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24

And then reboot ofcourse.

I will format another SD, download NOOBS again and install it and try what you suggest. I am not very optimistic though considering that this is happening on two different RP3's, with different SD cards, and different downloads of NOOBS. I still think it's something I did wrong when I set it up, but I will try again with everything fresh.

Maybe three times is the charm.

[MaxVMH]

Did it work?

[SurferTim]

If this is all that was entered in /etc/dhcpcd.conf

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24

then it didn't work. If you want internet access, you must enter a routers and domain_name_servers parameter also.

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24
static routers=192.168.0.1
static domain_name_servers=8.8.8.8

[RaTTuS]

also , don't use noobs use raspbain or raspbian lite if no desktop needed

[MaxVMH]

If this is all that was entered in /etc/dhcpcd.conf

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24

then it didn't work. If you want internet access, you must enter a routers and domain_name_servers parameter also.

Code: Select all

interface wlan0
static ip_address=192.168.0.215/24
static routers=192.168.0.1
static domain_name_servers=8.8.8.8

Using only those 2 lines work for me though, I use it on multiple debian-based OS’s.

[arvicrin]

Hi dude!
set it like that. It worked to me

static domain_name_servers = 8.8.8.8 8.8.4.4
(there is a space between 8.8.8.8 and 8.8.4.4)

regards from Colombia