diff --git a/README.md b/README.md
index d3925b96..2cee2f35 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,16 @@ Supported features:
 
 ---
 
+## Installing Docker on Armbian
+
+Most Armbian images ship without Docker. Run the included install script:
+
+```bash
+sudo bash docker/install-docker.sh
+```
+
+---
+
 ## Docker Quick Start
 
 Plug in your Huawei dongle, then:
diff --git a/docker/configs/iax.conf.template b/docker/configs/iax.conf.template
index 469b945a..3a9dc8ce 100644
--- a/docker/configs/iax.conf.template
+++ b/docker/configs/iax.conf.template
@@ -15,7 +15,7 @@ disallow=all
 allow=alaw
 allow=ulaw
 allow=g722
-encryption=no
+encryption=yes
 
 ; ── Trunk definition ──────────────────────────────────────────────────────
 [trunk]
diff --git a/docker/install-docker.sh b/docker/install-docker.sh
new file mode 100755
index 00000000..25253739
--- /dev/null
+++ b/docker/install-docker.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+# Install Docker CE on Armbian (Debian-based)
+# Usage: sudo bash install-docker.sh
+
+set -e
+
+echo "=== Removing old Docker packages (if any) ==="
+apt-get remove -y docker docker-engine docker.io containerd runc 2>/dev/null || true
+
+echo "=== Installing prerequisites ==="
+apt-get update
+apt-get install -y ca-certificates curl gnupg lsb-release
+
+echo "=== Adding Docker GPG key ==="
+mkdir -p /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+
+echo "=== Adding Docker repository ==="
+echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
+https://download.docker.com/linux/debian $(lsb_release -cs) stable" | \
+tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+echo "=== Installing Docker CE ==="
+apt-get update
+apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
+
+echo "=== Docker installed successfully ==="
+docker --version
+docker compose version