diff --git a/freepbx/entrypoint.sh b/freepbx/entrypoint.sh
index b0284114c..3154b3f3c 100755
--- a/freepbx/entrypoint.sh
+++ b/freepbx/entrypoint.sh
@@ -121,10 +121,13 @@ while (\$row = \$sth->fetch(\PDO::FETCH_ASSOC)) {
 
 EOF
 
-# Set public ip if not already set
+# Set proxy ip and port if not already set
 if [[ -z "${PROXY_IP}" ]]; then
     export PROXY_IP=$(curl -s https://api.ipify.org)
 fi
+if [[ -z "${PROXY_PORT}" ]]; then
+    export PROXY_PORT=5060
+fi
 
 # migrate database
 php /initdb.d/migration.php
diff --git a/imageroot/systemd/user/freepbx.service b/imageroot/systemd/user/freepbx.service
index aeaa8100e..4601dfc9f 100644
--- a/imageroot/systemd/user/freepbx.service
+++ b/imageroot/systemd/user/freepbx.service
@@ -59,6 +59,7 @@ ExecStart=/usr/bin/podman run \
     --env=SUBSCRIPTION_SYSTEMID \
     --env=SUBSCRIPTION_SECRET \
     --env=PROXY_IP \
+    --env=PROXY_PORT \
     --network=host \
     --hostname=${NETHVOICE_HOST} \
     ${NETHVOICE_FREEPBX_IMAGE}
diff --git a/imageroot/systemd/user/tancredi.service b/imageroot/systemd/user/tancredi.service
index d92f5a83f..2f2309282 100644
--- a/imageroot/systemd/user/tancredi.service
+++ b/imageroot/systemd/user/tancredi.service
@@ -30,6 +30,8 @@ ExecStart=/usr/bin/podman run \
     --env=NETHVOICE_MARIADB_PORT \
     --env=NETHVOICE_HOST \
     --env=TANCREDI_STATIC_TOKEN \
+    --env=PROXY_IP \
+    --env=PROXY_PORT \
     --network=host \
     ${NETHVOICE_TANCREDI_IMAGE}
 
diff --git a/tancredi/README.md b/tancredi/README.md
index 8236dc1b9..1600343a9 100644
--- a/tancredi/README.md
+++ b/tancredi/README.md
@@ -12,4 +12,6 @@ Tancredi code repository are https://github.com/nethesis/tancredi and https://gi
 - `NETHVOICE_HOST` hostname of NethVoice server devices will connect to
 - `NETHVOICE_MARIADB_PORT` port of MariaDB
 - `NETHVOICESECRETKEY` secret key used by NethVoice UI to authenticate with Tancredi
+- `PROXY_IP` sip proxy ip address to be used in extensions. Default is own public IP
+- `PROXY_PORT` sip proxy port. Default is 5060
 - `TANCREDI_STATIC_TOKEN` static token used by NethCTI to authenticate with Tancredi
diff --git a/tancredi/entrypoint.sh b/tancredi/entrypoint.sh
index 6d6f29ad9..acf86ef00 100755
--- a/tancredi/entrypoint.sh
+++ b/tancredi/entrypoint.sh
@@ -85,6 +85,17 @@ if [[ ! -f ${dst_file} ]]; then
 	echo 'adminpw = "'$(head /dev/urandom | tr -dc a-z0-9 | head -c 10)'"' >> ${dst_file}
 	echo 'userpw = "'$(head /dev/urandom | tr -dc a-z | head -c 6)'"' >> ${dst_file}
 	
+	# Set proxy ip and port if not already set
+	if [[ -z "${PROXY_IP}" ]]; then
+    	export PROXY_IP=$(curl -s https://api.ipify.org)
+	fi
+	if [[ -z "${PROXY_PORT}" ]]; then
+    	export PROXY_PORT=5060
+	fi
+
+	# Set default proxy
+	echo 'outbound_proxy_1 = "${PROXY_IP}"' >> ${dst_file}
+	echo 'outbound_proxy_port_1 = "${PROXY_PORT}"' >> ${dst_file}
 fi
 
 runuser -s /bin/bash -c "php /usr/share/tancredi/scripts/upgrade.php" - www-data