Required Tools¶

Install the following tools on your local machine before starting work.

Local Machine¶

cloudflared¶

Required for SSH access to the NUC when working remotely. Routes SSH through Cloudflare Tunnel.

brew install cloudflared

After installation, configure your ~/.ssh/config as described in Access Setup.

Zoiper (Softphone)¶

Used for testing inbound and outbound calls through the Astradial PBX.

Download: https://www.zoiper.com/

Configuration:

SSH Client¶

Any standard SSH client works. macOS and Linux include one by default. On Windows, use the built-in OpenSSH client or PuTTY.

Ensure you have generated an SSH key pair:

ssh-keygen -t ed25519 -C "your-name@astradial"

Send the contents of ~/.ssh/id_ed25519.pub to Hari for provisioning.

Web Browser¶

Required for accessing:

• Netdata dashboards -- system monitoring on NUC and cloud
• Cloudflare dashboard -- DNS and tunnel management

No special browser extensions are needed.

git¶

Required for cloning and working with Astradial repositories.

# macOS (comes with Xcode CLI tools)
xcode-select --install

# Or via Homebrew
brew install git

Verify access after your GitHub account has been added to the organization:

git clone git@github.com:astradial/sip-gateway.git

NUC Tools¶

The following tools are pre-installed on the NUC and used for SIP debugging. You do not need to install these locally.

sngrep¶

Interactive SIP message flow viewer. Essential for debugging call setup, registration, and oudio negotiation issues.

# On the NUC
sudo sngrep

Common usage patterns:

# Filter by SIP method
sudo sngrep -c INVITE

# Filter by IP address
sudo sngrep -d eth0 host 10.10.10.1

# Save capture to file
sudo sngrep -O /tmp/capture.pcap

tcpdump¶

Low-level packet capture tool. Use when you need to inspect traffic beyond SIP (RTP streams, WireGuard packets, etc.).

# Capture SIP traffic on the WireGuard interface
sudo tcpdump -i wg0 -w /tmp/capture.pcap port 5060

# Capture all traffic to/from Tata SIP endpoint
sudo tcpdump -i eth0 -w /tmp/tata.pcap host <tata-sip-ip>

# Quick SIP packet inspection without writing to file
sudo tcpdump -i any -n port 5060 -A

Tool Summary¶