Привет.
Bind_9.3.2
на провайдера настроено делегирование обратной зоны в 16-ть адресов, маска /28, зона начинается с 48. По RFC сделал название и прописал в named.conf
    zone "48/28.xx.xx.xx.in-addr.arpa" in {                                                                          
        type master;                                                                                                    
        file "/etc/bind/db/db.48.arpa";                                                                                
        allow-query { any; };                                                                                          
        allow-transfer { ns_prov; };                                                                                    
        allow-update { none; };                                                                                        
    };
вот такая конфигурация обратки
$ORIGIN 48/28.xx.xx.xx.in-addr.arpa.                                                                                    
$TTL 36000                                                                                                              
@       IN      SOA     ns.mydomain.org. root.mydomain.org. (                                                          
                                2006091502 ; serial                                                                    
                                36000      ; refresh (10 hours)                                                        
                                86400      ; retry (1 day)                                                              
                                2419200    ; expire (4 weeks)                                                          
                                604800 )   ; minimum (1 week)                                                          
;                                                                                                                      
@       10H     IN NS   ns.mydomain.org.                                                                                
@       10H     IN NS   ns1.myprov.org.                                                                                    
@       10H     IN NS   ns4.myprov.org.                                                                                    
$ORIGIN 48/28.xx.xx.xx.in-addr.arpa.                                                                                  
49      IN      PTR     gw.mydomain.org.                                                                                
50      IN      PTR     mydomain.org.                                                                                  
51      IN      PTR     vl.mydomain.org.                                                                            
52      IN      PTR     ig.mydomain.org.                                                                              
53      IN      PTR     os.mydomain.org.                                                                              
54      IN      PTR     lp.mydomain.org.                                                                              
55      IN      PTR     ad.mydomain.org.                                                                              
56      IN      PTR     koc.mydomain.org.                                                                              
57      IN      PTR     uk.mydomain.org.                                                                            
58      IN      PTR     kb.mydomain.org.                                                                              
59      IN      PTR     ne.mydomain.org.                                                                              
60      IN      PTR     ed.mydomain.org.                                                                                
61      IN      PTR     mx.mydomain.org.                                                                                
62      IN      PTR     ns.mydomain.org.

и тут самое интересное.
$ host 195.206.39.49                                                                                                    
49.39.206.195.in-addr.arpa domain name pointer gw.mydomain.org.                                                        
$ host 195.206.39.50                                                                                                    
50.39.206.195.in-addr.arpa domain name pointer mydomain.org.                                                            
$ host 195.206.39.51                                                                                                    
51.39.206.195.in-addr.arpa domain name pointer vl.mydomain.org.                                                        
$ host 195.206.39.52                                                                                                    
52.39.206.195.in-addr.arpa domain name pointer ig.mydomain.org.                                                        
$ host 195.206.39.53                                                                                                    
53.39.206.195.in-addr.arpa domain name pointer os.mydomain.org.                                                        
$ host 195.206.39.54                                                                                                    
Host 54.39.206.195.in-addr.arpa not found: 3(NXDOMAIN)                                                                  

$ host 195.206.39.55/56/57/58/59/60                                                                                             отвечают также not found: 3(NXDOMAIN)                                                      
            
$ host 195.206.39.61                                                                                                    
Host 61.39.206.195.in-addr.arpa not found: 3(NXDOMAIN)                                                                  
$ host 195.206.39.62                                                                                                    
Host 62.39.206.195.in-addr.arpa not found: 3(NXDOMAIN)                                                                  

$ host mx.mydomain.org                                                                                                  
mx.mydomain.org has address 195.206.39.61                                                                              
$ host ns.mydomain.org                                                                                                  
ns.mydomain.org has address 195.206.39.62

тоесть обратный резолвинг работает только для 5-ти адресов... почему не работает дальше - загадка. Синтакис чист, нет символов типа ^M и тп.

Есть какие-нибудь мысли?