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/91472b8d1015ace7c40c052a19913d38430d575f/src/modules/dispatcher/dispatch.c#L721-L722
https://github.com/kamailio/kamailio/blob/91472b8d1015ace7c40c052a19913d38430d575f/src/core/ip_addr.h#L325-L330

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.

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