diff --git a/engine/common/net_ws.c b/engine/common/net_ws.c
index 21cc89ba..70e80c71 100644
--- a/engine/common/net_ws.c
+++ b/engine/common/net_ws.c
@@ -2073,23 +2073,31 @@ void NET_Init( void )
 
 	// specify custom host port
 	if( Sys_GetParmFromCmdLine( "-port", cmd ) && Q_isdigit( cmd ))
-		Cvar_FullSet( "hostport", cmd, FCVAR_READ_ONLY );
+		Cvar_FullSet( net_hostport.name, cmd, net_hostport.flags );
 
 	// specify custom IPv6 host port
 	if( Sys_GetParmFromCmdLine( "-port6", cmd ) && Q_isdigit( cmd ))
-		Cvar_FullSet( "ip6_hostport", cmd, FCVAR_READ_ONLY );
+		Cvar_FullSet( net_ip6hostport.name, cmd, net_ip6hostport.flags );
+
+	// specify custom client port
+	if( Sys_GetParmFromCmdLine( "-clientport", cmd ) && Q_isdigit( cmd ))
+		Cvar_FullSet( net_clientport.name, cmd, net_clientport.flags );
+
+	// specify custom IPv6 client port
+	if( Sys_GetParmFromCmdLine( "-clientport6", cmd ) && Q_isdigit( cmd ))
+		Cvar_FullSet( net_ip6clientport.name, cmd, net_ip6clientport.flags );
 
 	// specify custom ip
 	if( Sys_GetParmFromCmdLine( "-ip", cmd ))
-		Cvar_FullSet( "ip", cmd, net_ipname.flags );
+		Cvar_DirectSet( &net_ipname, cmd );
 
 	// specify custom ip6
 	if( Sys_GetParmFromCmdLine( "-ip6", cmd ))
-		Cvar_FullSet( "ip6", cmd, net_ip6name.flags );
+		Cvar_DirectSet( &net_ip6name, cmd );
 
 	// adjust clockwindow
 	if( Sys_GetParmFromCmdLine( "-clockwindow", cmd ))
-		Cvar_SetValue( "clockwindow", Q_atof( cmd ));
+		Cvar_DirectSetValue( &net_clockwindow, Q_atof( cmd ));
 
 	net.sequence_number = 1;
 	net.initialized = true;