diff -ur v6/sock_ut.py v7/sock_ut.py
--- v6/sock_ut.py	2021-07-02 21:40:11.000000000 +0900
+++ v7/sock_ut.py	2021-07-14 22:40:49.000000000 +0900
@@ -59,8 +59,9 @@
 		if not send_bt( sc_to, bt ):
 			break
 
-# srv=name
-# port=xxx,srv=name,id=xxx
+# srv=name,port=xxx,host=xxx
+# srv=name,id=xxx,port=xxx,host=xxx
+# srv=name,id=xxx
 # kill=name
 # kill_base_srv
 # name
@@ -70,15 +71,20 @@
 		return {}
 	return dict( map( lambda t: t.split( '=' ), s.split( ',' ) ) )
 
+is_keys_dic = lambda d, ks: len( d ) == len( ks ) and all( map( lambda k: k in d, ks ) )
+
 is_key_dic = lambda d, k: len( d ) == 1 and k in d
 
-is_srv_dic = lambda d: is_key_dic( d, 'srv' )
+is_srv_dic = lambda d: is_keys_dic( d, [ 'srv', 'port', 'host' ] )
 
 is_kill_dic = lambda d: is_key_dic( d, 'kill' )
 
-def is_accept_dic( d ):
-	ks = [ 'port', 'srv', 'id' ]
-	return len( d ) == len( ks ) and all( map( lambda k: k in d, ks ) )
+is_accept_dic = lambda d: is_keys_dic( d, [ 'srv', 'id', 'port', 'host' ] )
+
+def get_port_host_from_dic( d ):
+	port = int( d.get( 'port' ) )
+	host = d.get( 'host' )
+	return ( port, host )
 
 srvs = {}
 reqs = {}
@@ -88,6 +94,8 @@
 	if name in srvs:
 		return
 
+	( port, host ) = get_port_host_from_dic( d )
+
 	q = thr.que_new()
 	srvs[ name ] = q
 
@@ -96,6 +104,7 @@
 		s = q.get()
 		if s == 'kill':
 			break
+		s += ',port={},host={}'.format( port, host )
 		if not send_str( sc, s ):
 			break
 
@@ -103,6 +112,7 @@
 	dbg.out( 'srv {} quit'.format( name ) )
 
 def base_th_accept( sc, s ):
+	s = ','.join( s.split( ',' )[ : -2 ] )
 	if s not in reqs:
 		return
 
@@ -116,11 +126,11 @@
 
 	pipe_loop( sc, sc2 )
 
-def base_th_connect( port, sc, s ):
+def base_th_connect( sc, s ):
 	name = s
 	q = srvs.get( name )
 	id = sc.fileno()
-	s = 'port={},srv={},id={}'.format( port, name, id )
+	s = 'srv={},id={}'.format( name, id )
 	ev = thr.event_new()
 	reqs[ s ] = [ sc, ev ]
 	q.put( s )
@@ -157,18 +167,18 @@
 		send_str( sc, 'next' )
 
 	elif s in srvs:
-		base_th_connect( port, sc, s )
+		base_th_connect( sc, s )
 
 	sc.close()
 
-def ping_th( port ):
+def ping_th():
 	id = 'ping'
 	for ( name, q ) in srvs.items():
-		s = 'port={},srv={},id={}'.format( port, name, id )
+		s = 'srv={},id={}'.format( name, id )
 		q.put( s )
 
 def base_srv( port ):
-	th_p = thr.loop_new( ping_th, ( port, ), wait_tmout=1.0 )
+	th_p = thr.loop_new( ping_th, wait_tmout=1.0 )
 	thr.ths.start( th_p )
 
 	ss = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
@@ -185,12 +195,12 @@
 	th_p.quit_ev.set()
 	dbg.out( 'base_srv quit' )
 
-def server( port, name ):
-	ss = port_conn( port )
+def server( port, name, host='localhost' ):
+	ss = port_conn( port, host )
 	if not ss:
 		return None
 
-	s = 'srv=' + name
+	s = 'srv={},port={},host={}'.format( name, port, host )
 	if not send_str( ss, s ):
 		ss.close()
 		return None
@@ -222,8 +232,8 @@
 	if not r:
 		return None
 	( s, d ) = r
-	port = int( d.get( 'port' ) )
-	cs = port_conn( port )
+	( port, host ) = get_port_host_from_dic( d )
+	cs = port_conn( port, host )
 	if not send_str( cs, s ):
 		cs.close()
 		return None
@@ -237,8 +247,8 @@
 	r = accept_recv( ss )
 	return accept_conn( r )
 
-def srv_loop( port, name, th_func ):
-	ss = server( port, name )
+def srv_loop( port, name, th_func, host='localhost' ):
+	ss = server( port, name, host )
 	if not ss:
 		return
 	while True:
@@ -263,8 +273,8 @@
 
 	return empty.new( locals() )
 
-def connect( port, name ):
-	cs = port_conn( port )
+def connect( port, name, host='localhost' ):
+	cs = port_conn( port, host )
 	if not cs:
 		return None
 
@@ -278,8 +288,8 @@
 		return None
 	return cs
 
-def kill_srv( port, name ):
-	cs = port_conn( port )
+def kill_srv( port, name, host='loaclhost' ):
+	cs = port_conn( port, host )
 	if not cs:
 		return
 	s = 'kill=' + name
@@ -287,8 +297,8 @@
 	send_str( cs, s )
 	cs.close()
 
-def kill_base_srv( port ):
-	cs = port_conn( port )
+def kill_base_srv( port, host='loaclhost' ):
+	cs = port_conn( port, host )
 	if not cs:
 		return
 	dbg.out( 'kill_base_srv' )
@@ -296,20 +306,20 @@
 	r = recv_str( cs )
 	cs.close()
 
-	cs = port_conn( port )  # for accept loop
+	cs = port_conn( port, host )  # for accept loop
 	if cs:
 		cs.close()
 
 def help():
 	lst = [
 		'\\',
-		'port base',
-		'port srv upper',
-		'port srv eval',
-		'port cli upper word word word ...',
-		'port cli eval word word word ...',
-		'port kill_base',
-		'port kill srv_name ( srv_name is upper, eval or ... )'
+		'base [ port=13579 ]',
+		'srv [ host=localhost ][ port=13579 ] upper',
+		'srv [ host=localhost ][ port=13579 ] eval',
+		'cli [ host=localhost ][ port=13579 ] upper word word word ...',
+		'cli [ host=localhost ][ port=13579 ] eval word word word ...',
+		'kill_base [ host=localhost ][ port=13579 ]',
+		'kill [ host=localhost ][ port=13579 ] srv_name ( srv_name is upper, eval or ... )'
 	]
 	dbg.help_exit( '\n'.join( lst ) )
 
@@ -324,7 +334,15 @@
 			help()
 		return argv.pop( 0 )
 
-	port = int( pop() )
+	def popk( k, dv=None ):
+		for i in range( len( argv ) ):
+			if argv[ i ].startswith( k ):
+				return argv.pop( i )[ len( k ) : ]
+		return dv		
+
+	host = popk( 'host=', 'localhost' )
+	port = int( popk( 'port=', '13579' ) )
+
 	names = {
 		'upper': lambda s: s.upper(),
 		'eval': lambda s: str( eval( s ) ),
@@ -338,11 +356,11 @@
 		if name in names:
 			cb = names.get( name )
 			srv_func = srv_func_new( cb )
-			srv_loop( port, name, srv_func.func )
+			srv_loop( port, name, srv_func.func, host )
 	elif cmd == 'cli':		
 		name = pop()
 		if name in names:
-			sc = connect( port, name )
+			sc = connect( port, name, host )
 			if not sc:
 				return
 			while len( argv ) > 0:
@@ -356,10 +374,10 @@
 			sc.close()
 	elif cmd == 'kill':
 		name = pop()
-		kill_srv( port, name )
+		kill_srv( port, name, host )
 
 	elif cmd == 'kill_base':
-		kill_base_srv( port )
+		kill_base_srv( port, host )
 
 
 if __name__ == "__main__":