nmblookup funguje jen jednosmerne

[Jaroslav Votruba]

muzete mi nekdo vysvetlit, proč nmblookup funguje jen jednim smerem? 
Pokud zadam IP tak nenajde NETBIOS jmeno ale obracene funguje bez problemu.
S parametrem -A [IP] to také funguje



[root at test63 ~/script]# nmblookup -T 192.168.0.92
querying 192.168.0.92 on 192.168.0.255
querying 192.168.0.92 on 10.0.1.255
name_query failed to find name 192.168.0.92


[root at test63 ~/script]# nmblookup -S votruba-wxp
querying votruba-wxp on 192.168.0.255
192.168.0.92 votruba-wxp<00>
Looking up status of 192.168.0.92
        VOTRUBA-WXP     <00> -         B <ACTIVE>
        TECHNOLOGIE     <00> - <GROUP> B <ACTIVE>
        VOTRUBA-WXP     <20> -         B <ACTIVE>
        TECHNOLOGIE     <1e> - <GROUP> B <ACTIVE>



pri googleni jsem ale narazil na bombasticky programek nbtscan 
(/usr/ports/net-mgmt/nbtscan), kde zadate rozsah site a on na vas 
vybafne IP, nazev stroje,uzivatele a MAC. Viz nize


IP address       NetBIOS Name     Server    User             MAC address
------------------------------------------------------------------------------
192.168.0.1      POSTAK           <server>  POSTAK           
00-00-00-00-00-00
192.168.0.9      SERVER-XP        <server>  AVSERVER         
00-08-02-f7-c8-72
192.168.0.10     PARTLOVA-HP      <server>  <unknown>        
00-1f-29-43-fc-e7
192.168.0.3      KEYTEC-W         <server>  <unknown>        
00-18-fe-8b-d1-3c
192.168.0.4      RSA              <server>  RSA              
00-00-00-00-00-00
192.168.0.11     MISTR-W2K        <server>  JUZKO            
00-11-09-88-85-9e
192.168.0.19     SUCHAN-W2K       <server>  SUCHAN           
22-00-20-02-00-10
192.168.0.18     DVORAK-WXP       <server>  <unknown>        
00-0f-ea-5c-a2-16
192.168.0.16     VLK-WXP          <server>  <unknown>        
00-22-15-3b-42-4b
192.168.0.5      TEST63           <server>  TEST63           
00-00-00-00-00-00