Hi Ali,
I don't think this would be related to IP resolution issue but you can try this
create /home/ansys_inc/shared_files/licensing/ansyslmd.ini file
with content
SERVER=1055@localhost
ANSYSLI_SERVERS=2325@localhost
ANSYSLI_EXTERNAL_IP=your_external_ip
then modify the content of license file in /home/ansys_inc/shared_files/licensing/license_files
from
SERVER head 003048dc8258 1055
to
SERVER 127.0.0.1 003048dc8258 1055
and try starting the ansysli_server again
Thanks,
Win