def get_resolver(server=None):
if server is None:
server = Server.self()
resolver = Resolver()
resolver.reset()
resolvconf = StringIO()
if server.ipv4:
resolvconf.write('nameserver %s\n' % (server.ipv4,))
if server.ipv6:
resolvconf.write('nameserver %s\n' % (server.ipv6,))
resolver.read_resolv_conf(resolvconf)
return resolver
