перезаписывется resolv.conf при рестарте системы

А там есть /etc/conf.d/net.example где все объяснено:

alexg@gus ~ $ grep dns /etc/conf.d/net.example
# set dhcp_ESSID="nodns"
#dns_servers_ESSID=( "192.168.0.1" "192.168.0.2" )
#dns_domain_ESSID="some.domain"
#dns_search_ESSID="search.this.domain search.that.domain"
#mac_dns_servers_001122334455=( "192.168.0.1" "192.168.0.2" )
#dhcp_eth0="release nodns nontp nonis nogateway nosendhost"
# overwrite dns, ntp and nis settings, not to set a default route and not to
#dns_servers_192168000001=( "192.168.0.1" )
#dns_servers_010000000001=( "10.0.0.1" )
#dns_servers_192168000001_001122AABBCC=( "192.168.0.1" )
#dns_servers_010000000001_334455DDEEFF=( "10.0.0.1" )
#       "usepeerdns"    # Use the DNS settings provided by PPP
# For configuring system specifics such as domain, dns, ntp and nis servers
# To use dns settings such as these, dns_servers_eth0 must be set!
#dns_domain_eth0="your.domain"
#dns_servers_eth0="192.168.0.2 192.168.0.3"
#dns_search_eth0="this.domain that.domain"
#dns_options_eth0=( "timeout 1" "rotate" )
#dns_sortlist_eth0="130.155.160.0/255.255.240.0 130.155.0.0"

В данном случае вот эта строчка:
#dns_servers_ESSID=( "192.168.0.1" "192.168.0.2" )
а может еще и вот эта нужна:
set dhcp_ESSID="nodns"