DNS_EXPAND - UEM Manager configuration option
Description
The DNS_EXPAND option specifies how many IP addresses are returned to UEM Manager following a DNS query, which is issued to resolve a host name.
If the UEM Manager is configured to expand the results of the query, all IP addresses defined for a particular host name are returned and expanded (in-place) within the list of hosts specified for the REMOTE_HOST option. Otherwise, only the first host is returned, and no expansion is performed.
For example, if a host list contains six host names, and the name in the 3rd position resolves to five IP addresses, those addresses will occupy positions 3-7 in the expanded list. Subsequent hosts specified by the user will begin at the 8th position in the expanded list.
That is:
- If the REMOTE_HOST list contains:
-host host1,host2,host3,host4,host5,host6
- And host3 resolves to:
ip3a, ip3b, ip3c, ip3d, and ip3e
- Then after the other hosts are resolved, the list will be expanded to:
-host ip1,ip2,ip3a,ip3b,ip3c,ip3d,ip3e,ip4,ip5,ip6
Usage
Method | Syntax | IBM i | HP NonStop | UNIX | Windows | z/OS |
---|---|---|---|---|---|---|
Command Line, Short Form | n/a | |||||
Command Line, Long Form | -dns_expand option | |||||
Environment Variable | UEMDNSEXPAND=option | |||||
Configuration File Keyword | dns_expand option |
Values
option specifies whether or not DNS query results are expanded.
Valid values for option are:
- yes
All IP addresses returned by a DNS for a given query are returned. - no
Only the first IP address returned by a DNS for a given query is returned.
Default is no.