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I'm trying to open up port 1900 for UDP in order for the Echo to be able to discover the HA Bridge using the following command but I get errors. What is the best solution to fix this?

pi@raspberrypi:~/hue $ sudo iptables -I INPUT -p udp --dport 1900 -j ACCEPT
modprobe: ERROR: ../libkmod/libkmod.c:557 kmod_search_moddep() could not open moddep file '/lib/modules/4.1.17-v7+/modules.dep.bin'
iptables v1.4.21: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
pi@raspberrypi:~/hue $ sudo depmod
depmod: ERROR: could not open directory /lib/modules/4.1.17-v7+: No such file or directory
depmod: FATAL: could not search modules: No such file or directory

pi@raspberrypi:~/hue $ sudo apt-get install --reinstall linux-image-4.1.17
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package linux-image-4.1.17
E: Couldn't find any package by regex 'linux-image-4.1.17'

pi@raspberrypi:~/hue $ uname -a
Linux raspberrypi 4.1.17-v7+ #838 SMP Tue Feb 9 13:15:09 GMT 2016 armv7l GNU/Linux

2 Answers 2

2

These commands solved the problem for me (change the versions respectively):

 601  ls -lha /lib/modules
  602  pwd
  603  cp -R /lib/modules/4.1.18+ /lib/modules/4.1.17+
  604  sudo cp -R /lib/modules/4.1.18+ /lib/modules/4.1.17+
  605  sudo cp -R /lib/modules/4.1.18-v7+/ /lib/modules/4.1.17-v7+
  606  sudo apt-get install rpi-update
  607  sudo iptables --list
  608  sudo iptables -I INPUT -p udp --dport 1900 -j ACCEPT
2

This is a common error on old raspberry pi devices specialy if you install any additional iptable plugins (in my case it was PSAD which is not quite a plugin it just read logs) ,Jalal answer is correct but it don't need those module coping and it skipped a few steps.

As error says , iptable or raspberry pi firmware needs to update , mostly firmware needs to be updated, so you need to install rpi-update and run it but you must gave execute permission to /sbin/depmod first.

All you need to do is :

sudo apt-get install rpi-update
sudo chmod +x /sbin/depmod
sudo sudo rpi-update

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