node red Error: listen EACCES: permission denied 0.0.0.0:80

[blue-danube-vienna]

Hi!

After update from 1.4.0 to 2.0.0 the message "node red Error: listen EACCES: permission denied 0.0.0.0:80" appears.

I have nginx with proxy_pass to port 60000 installed.

iptables -t nat -I PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 60000 does even not work...

is the port 60000 disabled in 2.0.0 ??

please help best regards blue_danube

[mabunixda]

No the port is not disabled, but the default port is set to 80. But of course this should not be overwritten on existing configurations/setups. You can also use the proxy method that your nodered installations webserver is used for all communication.

[blue-danube-vienna]

I have had an existing installation. After the update in node-red via manage palette and a restart node-red no longer started.. The node-red log says "node red Error: listen EACCES: permission denied 0.0.0.0:80"

As an emergency solution, I set the sysctl -w net.ipv4.ip_unprivileged_port_start=80 and deactivated nginx, but that's not a permanent solution either.

[GrisuLychen]

Hi, sorry i had to push the topic because i can't solve the problem. I get the same error after the update and whatever i write in the port setup, it seams as the plugin use port 80 an node red crashed or was suspended (runnig as a service or with pi user). I dont want to use root and i did not understand the workaround from blue-danube. Can you help me please. How can i change the port to 60000 or another unprivileged port.

Finaly i also want to say thank you for your great work with the node!

Best Regards Grisu

[mabunixda]

Alexa device need to communicate on port 80. ypu can try to use the proxy flag „use node as webserver“ on the latest version

here the webserver of nodered is used and no other is started.

[GrisuLychen]

Hi mabunixda, thank you for your advice. Unfortunately it also dosn't work.

Because I didn't know what to do anymore, i read the files of the node and seach for port 80. And what shoud i say, i dont know why, but i found something and it seams to work. I change the "80" in /home/pi/.node-red/node_modules/node-red-contrib-alexa-home/alexa/alexa-helper.js to 8980 and restart node red. In my old setup i prerout the port 80 to 8980 like in the description of the node.

I did not check if alexa find new entries or lights but my homeserver worked for now in the old configuration an my home is a bit smarter again.

[mabunixda]

Fine :) The information about prerouting was also missing on your last post ...