olofssonanton created an issue (kamailio/kamailio#4338)

Here in `ds_is_addr_from_set`, `he->h_addr_list` may contain more than one address, but only the first address (as seen by the third argument, `addr_no`) is stored and later used for comparison. https://github.com/kamailio/kamailio/blob/91472b8d1015ace7c40c052a19913d3843... https://github.com/kamailio/kamailio/blob/91472b8d1015ace7c40c052a19913d3843...

If a request is from any other address than the first in the resolved `hostent` address list, `ds_is_from_list` will give a false negative.