diff --git a/src/hd-rum-translator/hd-rum-translator.cpp b/src/hd-rum-translator/hd-rum-translator.cpp
index cff7cab9d..3e2e39c3f 100644
--- a/src/hd-rum-translator/hd-rum-translator.cpp
+++ b/src/hd-rum-translator/hd-rum-translator.cpp
@@ -706,7 +706,7 @@ int main(int argc, char **argv)
     state.qhead = state.qtail = state.queue = qinit(qsize);
 
     /* input socket */
-    if ((sock_in = udp_init_if("::1", NULL, params.port, 0, 255, false, false)) == NULL) {
+    if ((sock_in = udp_init_if("localhost", NULL, params.port, 0, 255, false, false)) == NULL) {
         perror("input socket");
         return 2;
     }
diff --git a/src/main.cpp b/src/main.cpp
index 7dd520b13..b760a3592 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -506,7 +506,7 @@ int main(int argc, char *argv[])
         unsigned requested_mtu = 0;
         const char *postprocess = NULL;
         const char *requested_display = "none";
-        const char *requested_receiver = "::1";
+        const char *requested_receiver = "localhost";
         const char *requested_encryption = NULL;
         struct exporter *exporter = NULL;
 
diff --git a/src/rtp/net_udp.cpp b/src/rtp/net_udp.cpp
index 1907ca8cc..8c3d314c8 100644
--- a/src/rtp/net_udp.cpp
+++ b/src/rtp/net_udp.cpp
@@ -1268,7 +1268,8 @@ static int resolve_address(socket_udp *s, const char *addr, uint16_t tx_port)
         memset(&hints, 0, sizeof(hints));
         switch (s->local->mode) {
         case 0:
-                hints.ai_family = AF_UNSPEC;
+                hints.ai_family = AF_INET6;
+                hints.ai_flags = AI_V4MAPPED | AI_ALL;
                 break;
         case IPv4:
                 hints.ai_family = AF_INET;
@@ -1454,7 +1455,7 @@ static void udp_clean_async_state(socket_udp *s)
 
 bool udp_is_ipv6(socket_udp *s)
 {
-        return s->local->mode == IPv6;
+        return s->local->mode == IPv6 && !IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *) &s->sock)->sin6_addr);
 }
 
 bool udp_port_pair_is_free(const char *addr, int force_ip_version, int even_port)
diff --git a/src/rtp/rtp.c b/src/rtp/rtp.c
index c9c31a69a..90837931e 100644
--- a/src/rtp/rtp.c
+++ b/src/rtp/rtp.c
@@ -1212,7 +1212,7 @@ rtp_t rtp_init_with_udp_socket(struct socket_udp_local *l, struct sockaddr *sa,
         session->send_rtcp_to_origin = true;
 
         session->rtp_socket = udp_init_with_local(l, sa, len);
-        session->rtcp_socket = udp_init_if("::1", NULL, 0, 0, ttl, true, false);
+        session->rtcp_socket = udp_init_if("localhost", NULL, 0, 0, ttl, true, false);
 
         init_opt(session);
 
diff --git a/src/video_capture/rtsp.cpp b/src/video_capture/rtsp.cpp
index 1ce408fac..91fb5bfd4 100644
--- a/src/video_capture/rtsp.cpp
+++ b/src/video_capture/rtsp.cpp
@@ -612,7 +612,7 @@ vidcap_rtsp_init(const struct vidcap_params *params, void **state) {
 
     s->should_exit = FALSE;
 
-    s->vrtsp_state->device = rtp_init_if("::1", s->vrtsp_state->mcast_if, s->vrtsp_state->port, 0, s->vrtsp_state->ttl, s->vrtsp_state->rtcp_bw,
+    s->vrtsp_state->device = rtp_init_if("localhost", s->vrtsp_state->mcast_if, s->vrtsp_state->port, 0, s->vrtsp_state->ttl, s->vrtsp_state->rtcp_bw,
         0, rtp_recv_callback, (uint8_t *) s->vrtsp_state->participants, 0, true);
 
     if (s->vrtsp_state->device != NULL) {
diff --git a/src/video_capture/ug_input.cpp b/src/video_capture/ug_input.cpp
index 370e0a315..c56b06f40 100644
--- a/src/video_capture/ug_input.cpp
+++ b/src/video_capture/ug_input.cpp
@@ -116,7 +116,7 @@ static int vidcap_ug_input_init(const struct vidcap_params *cap_params, void **s
         //RTP
         params["mtu"].i = 9000; // doesn't matter anyway...
         // should be localhost and RX TX ports the same (here dynamic) in order to work like a pipe
-        params["receiver"].ptr = (void *) "::1";
+        params["receiver"].ptr = (void *) "localhost";
         if (isdigit(vidcap_params_get_fmt(cap_params)[0]))
                 params["rx_port"].i = atoi(vidcap_params_get_fmt(cap_params));
         else