Create SELinux Modul

Create file my-httpd-php-ping.te and put this in it

• cat my-httpd-php-ping.te

module my-httpd-php-ping 1.0;

require {
        type httpd_t;
        class capability { net_admin net_raw };
        class icmp_socket create;
        class rawip_socket { create getopt read setopt write };
}

#============= httpd_t ==============
allow httpd_t self:capability { net_admin net_raw };
allow httpd_t self:icmp_socket create;
allow httpd_t self:rawip_socket { create getopt read setopt write };

Compile it to a SELinux module like so

• checkmodule -M -m -o my-httpd-php-ping.mod my-httpd-php-ping.te
• semodule_package -o my-httpd-php-ping.pp -m my-httpd-php-ping.mod

And install it:

• semodule -i my-httpd-php-ping.pp

Afterwards, enable SELinux again

• setenforce 1

Links

• https://unix.stackexchange.com/questions/675203/selinux-blocks-ping-from-php-exec
• https://forums.centos.org/viewtopic.php?t=49172
• https://phpipam.net/news/selinux-policy-for-icmp-checks/