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dnsmasq

dnsmasq: failed to create IPset control socket: Permission denied

When I start dnsmasq service in CentOS 7, I get such status:

enter image description here

This is because I add a wblist.conf in /etc/dnsmasq.d/wblist.conf

cat wblist.conf

# for router itself
server=/google.com.tw/192.168.8.20#53
ipset=/google.com.tw/gfwlist

ipset -L gfwlist

Name: gfwlist
Type: hash:net
Revision: 3
Header: family inet hashsize 1024 maxelem 65536
Size in memory: 16784
References: 0
Members:

But if I COMMENT the ipset line, the service can be restarted successfully.

I don't know why. I have used dnsmasq/ipset for a long time, but suddenly got this problem.

Have anyone met this situation?

Solution

  • Disable SElinux is not recommend.

    You can solve this problem by create and install a SELinux Policy Modules.

    First you need create a type enforcement rules file called my-dnsmasq.te, content like below:

    module my-dnsmasq 1.0;

require {
        type dnsmasq_t;
        class netlink_socket { bind create write };
}

#============= dnsmasq_t ==============
allow dnsmasq_t self:netlink_socket { bind create write };

    Now you can compile it into a policy module package file:

    checkmodule -M -m -o my-dnsmasq.mod my-dnsmasq.te
semodule_package -o my-dnsmasq.pp -m my-dnsmasq.mod

    Once you get the policy module package file my-dnsmasq.pp, install it:

    sudo semodule -i my-dnsmasq.pp

    Finally, restart the dnsmasq.service:

    sudo systemctl restart dnsmasq

    And make a test like below:

    nslookup google.com.tw
ipset list gfwlist

    If everything is fine, you will see a ip is added to ipset.