Domain Name Service (DNS) provides the system by which Internet domain names (e.g. ezproxy.yourlib.org) are translated into TCP/IP addresses (e.g. 18.104.22.168). DNS entries are maintained by your network administrator.
OCLC recommends the use of an A (address) record for your EZproxy server, not a CNAME (canonical name) record. Either can be used for Proxy by Port, but only an A record will work for Proxy by Hostname.
If you are using EZproxy in Proxy by Port, your network administrator creates a single DNS entry for your EZproxy server to map its name to its address.
If you are using EZproxy in Proxy by Hostname, your network administrator creates two DNS entries. See Proxy by Hostname for more information on the specific records required.
DNS Proxy by Port Proxy by Hostname