wi fi - where are DNS settings under 4.4.2?

I cannot find where to configure DNS settings for this device:

Model number:        astar
Processor type:      QuadCore-A33
Android version:     4.4.2
Firmware version:    v2.0
Kernel version:      3.4.39
                     mmy@ubuntu #1
                     Fri Sep 25 14:17:42 CST 2015
Build number:        astar-rt18703-eng 4.4.2 KVT49L 20150925 test-keys

Based on a previous question, it seems possible -- I've looked all through settings on wi-fi, ethernet, etc.