Arch Linux

calle

Member

From: Germany

Registered: 2008-11-14

Posts: 45

Name resolution in VPN network

At work I connect to a VPN. To resolve hostnames in that VPN, a nameserver is pushed. When I run drill @NAME.SERVER.IP.ADD HOSTNAME, the correct IP address is returned. When I do ping HOSTNAME, the name cannot be resolved however. I am using pdnsd to locally cache DNS entries. My pdnsd.conf looks like this

global {                                                                        
        perm_cache=1024;                                                        
        cache_dir="/var/cache/pdnsd";                                           
#       pid_file = /var/run/pdnsd.pid;                                          
        run_as="pdnsd";                                                         
        server_ip = 127.0.0.1;  # Use eth0 here if you want to allow other      
                                # machines on your network to query pdnsd.      
        status_ctl = on;                                                        
#       paranoid=on;       # This option reduces the chance of cache poisoning  
                           # but may make pdnsd less efficient, unfortunately.  
        query_method=udp_tcp;                                                   
        min_ttl=15m;       # Retain cached entries at least 15 minutes.         
        max_ttl=1w;        # One week.                                          
        timeout=10;        # Global timeout option (10 seconds).                
        neg_domain_pol=on;                                                      
        udpbufsize=1024;   # Upper limit on the size of UDP messages.           
} 

server {                                                                        
        label= "resolvconf";                                                    
        file = "/etc/pdnsd-resolv.conf";  # Preferably do not use /etc/resolv.conf
        proxy_only=on;                                                          
        timeout=4;                                                              
        uptest=if;                                                              
        interface = wlp4s0;                                                     
        interval=10;       # Check the interface every 10 seconds.              
        purge_cache=off;                                                        
        preset=off;                                                             
}    

/etc/pdnsd-resolv.conf contains the pushed nameserver address.

/etc/resolv.conf contains nameserver 127.0.0.1.

/etc/resolvconf.conf contains:

# Configuration for resolvconf(8)
# See resolvconf.conf(5) for details

#resolv_conf=/etc/resolv.conf
name_servers=127.0.0.1
pdnsd_resolv=/etc/pdnsd-resolv.conf
# If you run a local name server, you should uncomment the below line and
# configure your subscribers configuration files below.
#name_servers=127.0.0.1

My understanding of the whole name resolution process/VPN is probably very limited. Does anyone have an idea what I might be doing wrong, or point me in the correct direction to further debug my problem?

Thanks in advance!