Q. How are ADNS and DNS configured on the NetScaler?
A. NetScaler can be configured as an ADNS server where it’s authoritative for all queries defined on the NetScaler. It can also be used to load balance external DNS servers. The script below provides examples of both types of configurations:
ADNS:
NS-IP: 10.102.1.150 NetScaler IP Address
NS-MIP: 10.102.1.151 NetScaler Mapped IP Address
#RS9000 will respond to DNS queries on 10.102.1.151 port 53
add service adns_svc 10.102.1.151 ADNS 53
#adding address records on the NetScaler
add dns addrec abc.com 10.102.1.25 -ttl 25
add dns addrec abc.com 10.102.1.26 -ttl 25
add dns addrec abc.com 10.102.1.27 -ttl 25
add dns addRec ns1.abc.com 10.102.1.3
add dns addRec ns2.abc.com 10.102.1.4
add dns addrec mail.abc.com 10.102.1.33
add dns addrec mail1.abc.com 10.102.1.34
# Canonical Name Records
add dns cnameRec www.abc.com abc.com
# Name Server Records
add dns nsRec abc.com -p ns1.abc.com -s ns2.abc.com
#Mail Exchanger Records
add dns mxRec abc.com -mx mail.abc.com -pref 1
add dns mxRec abc.com -mx mail1.abc.com -pref 2
#Source Of Authority Records
add dns soaRec abc.com -contact root.abc.com -serial 20020121 -refresh 3600 -retry 600 -expire 86400 -minimum 600 -TTL 60
DNS:
# In the proxy mode a DNS service type VIP is created
# To this vip are bound external dns servers
# DNS-VIP: 10.102.1.210
# External DNS Servers: 203.124.140.19; 203.124.140.20
# RS9000 will respond to DNS queries on 10.102.1.210 port 53
# Enable Load Balancing Feature
enable ns feature lb
# Add external DNS servers
add service ext_dns_1 203.124.140.19 dns 53
add service ext_dns_2 203.124.140.20 dns 53
# Bind monitor to the service
bind monitor dns ext_dns_1
bind monitor dns ext_dns_2
# Create a DNS Vserver
add lb vserver vdns dns 10.102.1.210 53
#Bind the external dns services to the dns vserver
##
bind lb vserver vdns ext_dns_1
bind lb vserver vdns ext_dns_2
