Tezla Tech Tools · Field series

Your phone is the DHCP server now.

Plug a USB-C Ethernet adapter into your Android phone, tap once, and it hands out addresses to whatever's on the other end of the cable. No firewall. No domain controller. No waiting.

Born in the field

It started on a job site.

A network going in. Access points sitting dark on an isolated switch, no addresses, adoption stalled — and no DHCP anywhere because the firewall wasn't up yet. Standing there thinking: why am I waiting on a firewall to hand out addresses?

So we built the thing. Field DHCP turns the phone already in your pocket into the DHCP server — and, when you need it, the internet uplink too. It went from a job-site frustration to a tool our own techs reach for first.

That's how every Tezla tool is born: in the field, under pressure, because the work demanded it.

What it does

Three jobs, one tap.

One button. The phone takes it from there.

Serve

Hand out addresses

A real DHCP server on the USB-Ethernet interface. Configurable pool (default 192.168.50.50–150), lease times, gateway and DNS options. Gear gets addresses in seconds.

See

Watch devices appear

A live lease table — every device that pulls an address, with MAC and vendor lookup. You watch your access points come alive in real time.

Lend it your internet

Share the phone's mobile data or Wi-Fi over the cable, so adopted gear can pull firmware and reach the cloud controller. Adoption, unblocked.

One-tap profiles

Pick the job. Tap. Go.

Adopt

Isolated gear, DHCP only, no uplink. For bringing access points and switches onto a quiet bench network.

Online

DHCP plus your phone's internet. Firmware downloads, cloud adoption, the works.

Lab

Custom pool for bench testing. Your sandbox, your rules.

Straight talk

The honest requirement.

It needs a rooted Android.

A real DHCP server has to bind UDP port 67, and Android only allows that on a rooted device. That's not our rule — that's the operating system's. So Field DHCP runs at full power on a rooted field phone or tablet.

No root? The app falls back to network-scanner and static-IP helper mode — still useful, just not a true server. And iPhones can't do this at all — Apple doesn't allow it. Android only, and we're upfront about it.

Safety is built in, not bolted on. A rogue DHCP server on a live network causes outages — so the app refuses to start if it detects an existing DHCP server, shuts itself off on a timer, and logs every lease for the ticket. Railroad Tracks: the tool protects you from yourself.

In build — field-tested first.

Field DHCP is in active build. Like every Tezla tool, our own techs beat on it in the field before it ships anywhere else. When it's ready, it goes to the crew first — then to the world.