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I used the Ubuntu 16.04 system and had problems configuring iptables. How to solve this problem? 

modprobe: ERROR: could not insert 'ip_tables': Operation not permitted iptables v1.6.0: can't initialize iptables table `filter': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded.
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You don't have a problem configuring iptables, you have a problem loading the required module.

Are you running the command as root? The error Operation not permitted indicates that the module is not missing, you seem to lack the permission to load the module.

If you are running as root, it is also possible that additional restrictions prevent you from loading the module, such as AppArmor or SELinux.

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