[ssh_x509] CentOS 6 error: sys_get_rdomain: cannot determine VRF for fd=3 : Protocol not available

[ssh_x509 at roumenpetrov.info]

I've compiled 11.3.2 on both CentOS 7 and CentOS 6 using the following:

configure --prefix=/opt/pkixssh --enable-ocsp --with-pam --with-selinux

I get the following error on CentOS 6 in /var/log/secure:

error: sys_get_rdomain: cannot determine VRF for fd=3 : Protocol not
available

I do not get this error on CentOS 7.

Both machines have the same sshd_config file.

I did not get this error on CentOS 6 under 11.3.1.

Jose