HotSpot

HotSpot is a built-in captive portal functionality in RouterOS that provides network access control through a web-based authentication system. It is commonly used by wireless internet service providers (WISPs), cafes, hotels, and other venues offering guest network access.

Overview

The HotSpot system provides:

Captive Portal — Automatic redirect of unauthenticated users to a login page
User Authentication — Local user database or RADIUS integration
Billing and Accounting — Time and data volume tracking
Access Control — MAC filtering, IP binding, and session management
Walled Garden — Unrestricted access to specific sites before login
Customizable Login Pages — HTML-based login page with template variables
HTTPS Login — Secure credential submission with certificate-based TLS

Use Cases

Guest WiFi in cafes, hotels, and airports
Public wireless access points
WISP customer authentication
Corporate guest networks
Paid internet access (time-based or volume-based)

How HotSpot Works

Authentication Flow

User connects to the wireless or wired guest network
User opens a web browser and attempts to access any HTTP website
HotSpot intercepts the request and redirects to the login page (HTTP or HTTPS)
User enters credentials or clicks through for open access
HotSpot validates credentials against the local user database or RADIUS server
On successful authentication, the user is granted internet access
Session time and data usage are tracked until logout or session timeout

Network Architecture

HotSpot operates on a dedicated interface or bridge, creating an isolated segment for guest users. The router acts as the default gateway, DNS resolver, and captive portal server for that segment.

Guest Device ── WiFi ── [br-guest] ── HotSpot Engine ── NAT ── WAN ── Internet
                                             │
                                        Login Page (HTTP/HTTPS)
                                        DHCP Server
                                        DNS Server

Configuration Paths

Feature	Command Path
HotSpot servers	`/ip hotspot`
HotSpot profiles	`/ip hotspot profile`
User management	`/ip hotspot user`
User profiles	`/ip hotspot user profile`
Active sessions	`/ip hotspot active`
Walled garden (HTTP)	`/ip hotspot walled-garden`
Walled garden (IP)	`/ip hotspot walled-garden ip`
IP bindings	`/ip hotspot ip-binding`
Hosts table	`/ip hotspot host`

Complete Guest WiFi Portal Setup

This section covers a complete end-to-end setup for a guest WiFi captive portal.

Step 1: Create Bridge and Add WiFi Interface

# Create a dedicated bridge for guest traffic
/interface bridge
add name=br-guest comment="Guest HotSpot bridge"

# Add wireless interface to guest bridge
/interface bridge port
add bridge=br-guest interface=wlan1

Step 2: Assign Gateway IP

/ip address
add address=10.5.50.1/24 interface=br-guest comment="Guest gateway"

Step 3: Configure DHCP

# Create address pool
/ip pool
add name=pool-guest ranges=10.5.50.10-10.5.50.254

# Create DHCP server
/ip dhcp-server
add name=dhcp-guest interface=br-guest address-pool=pool-guest disabled=no

# Configure network options (gateway + DNS pointing at router)
/ip dhcp-server network
add address=10.5.50.0/24 gateway=10.5.50.1 dns-server=10.5.50.1

Step 4: Enable DNS for Guests

/ip dns
set allow-remote-requests=yes servers=1.1.1.1,8.8.8.8

Step 5: Run the HotSpot Setup Wizard

The wizard creates the HotSpot server, hotspot IP pool (if needed), and an initial local user:

/ip hotspot setup

The wizard prompts for:

Prompt	Example Answer
HotSpot interface	`br-guest`
Local address of network	`10.5.50.1/24`
Masquerade network	`yes`
Address pool of network	`10.5.50.10-10.5.50.254`
Select certificate	`none` (or choose existing cert for HTTPS)
Select SMTP server	`0.0.0.0`
DNS servers	`1.1.1.1`
DNS name	`login.example.com`
Create local HotSpot user	`admin` / `password`

The wizard automatically creates:

A HotSpot server on the specified interface
DHCP server (if not already present)
Firewall NAT masquerade rule for the HotSpot subnet
Walled garden entries for the login page itself

Step 6: Configure NAT for Internet Access

If not created by the wizard, add a masquerade rule manually:

/ip firewall nat
add chain=srcnat action=masquerade out-interface-list=WAN \
    comment="Guest HotSpot internet access"

Step 7: Verify the Setup

# Check HotSpot server is running
/ip hotspot print

# Check DHCP leases
/ip dhcp-server lease print where server=dhcp-guest

# Check hosts detected by HotSpot
/ip hotspot host print

# Check active authenticated sessions
/ip hotspot active print

# Check NAT rule hit count
/ip firewall nat print stats where chain=srcnat

Expected behavior: a guest device connects to the WiFi, gets a 10.5.50.x DHCP lease, any HTTP request is intercepted and redirected to the login page, and after successful login internet access works.

HTTPS Redirect and Certificate Requirements

By default, HotSpot redirects HTTP traffic to the login page. To enable HTTPS for the login page (so credentials are encrypted in transit), you must assign a certificate to the HotSpot profile.

Why HTTPS Matters

Without HTTPS, login credentials are submitted in plain text over the local network. Using HTTPS encrypts the form submission. Note that HotSpot cannot intercept HTTPS destinations transparently — browsers enforce TLS trust and will show certificate errors if the original HTTPS site’s cert doesn’t match. Only HTTP requests trigger smooth captive portal redirects; HTTPS interception requires the browser to accept a trust exception.

Create a Self-Signed Certificate

For internal or low-security deployments, a self-signed certificate is sufficient (browsers will show a trust warning):

# Create CA certificate
/certificate
add name=hotspot-ca common-name="HotSpot CA" key-size=2048 \
    days-valid=3650 key-usage=key-cert-sign,crl-sign

# Sign CA certificate
/certificate sign hotspot-ca

# Create server certificate for the login hostname
/certificate
add name=hotspot-cert common-name=login.example.com key-size=2048 \
    days-valid=730 subject-alt-name=IP:10.5.50.1,DNS:login.example.com

# Sign server certificate with the CA
/certificate sign hotspot-cert ca=hotspot-ca

Import a Trusted Certificate

For production deployments, import a certificate signed by a public CA (e.g., Let’s Encrypt):

# Upload certificate files via FTP or drag-and-drop in WinBox Files view
# Then import:
/certificate import file-name=hotspot.crt passphrase=""
/certificate import file-name=hotspot.key passphrase=""

Assign Certificate to HotSpot Profile

/ip hotspot profile
set [find name=hsprof1] ssl-certificate=hotspot-cert login-by=https

Key profile parameters for HTTPS:

Parameter	Description
`ssl-certificate`	Certificate to use for HTTPS login page
`login-by`	Authentication methods: `cookie`, `http-chap`, `http-pap`, `https`, `mac`, `trial`
`https-redirect`	Redirect HTTP clients to HTTPS login page automatically

User Management

Local Users

Create users in the local HotSpot user database:

# Basic user with no limits
/ip hotspot user add name=guest password=guest123

# User with time limit
/ip hotspot user add name=user1 password=pass123 \
    profile=default limit-uptime=1h

# User with data volume limit
/ip hotspot user add name=user2 password=pass456 \
    profile=default limit-bytes-total=500M

# View all users
/ip hotspot user print

# View active sessions
/ip hotspot active print

User Profiles

Profiles define resource limits and billing parameters shared across multiple users:

# Time-limited profile (1 hour sessions)
/ip hotspot user profile
add name="1-hour" \
    session-timeout=1h \
    idle-timeout=5m \
    rate-limit=5M/5M \
    shared-users=1 \
    add-mac-cookie=yes

# Data-limited profile (500 MB)
/ip hotspot user profile
add name="500MB" \
    limit-bytes-total=500M \
    shared-users=5

# Premium unlimited with rate limiting
/ip hotspot user profile
add name="premium" \
    rate-limit="20M/20M" \
    shared-users=1 \
    session-timeout=0 \
    idle-timeout=0

Key profile parameters:

Parameter	Description
`session-timeout`	Maximum session duration (0 = unlimited)
`idle-timeout`	Disconnect after period of inactivity
`rate-limit`	Per-session bandwidth limit (rx/tx, supports burst)
`shared-users`	Maximum simultaneous users sharing one credential
`limit-bytes-total`	Total data cap (upload + download)
`add-mac-cookie`	Enable MAC cookie to avoid re-login on same device
`on-login` / `on-logout`	Scripts to run on session start/end

For the complete parameter reference — including burst rate format, queue integration, firewall marks, advertise, and login scripts — see the User Profiles guide.

RADIUS Integration

For centralized authentication and accounting across multiple HotSpot servers, integrate with a RADIUS server.

Configure the RADIUS Client

# Add external RADIUS server
/radius
add address=192.0.2.10 \
    service=hotspot \
    secret=strong-radius-secret \
    authentication-port=1812 \
    accounting-port=1813 \
    timeout=300ms

# Optional: accounting backup to secondary server
/radius
add address=192.0.2.11 \
    service=hotspot \
    secret=strong-radius-secret \
    authentication-port=1812 \
    accounting-port=1813 \
    backup=yes

Enable RADIUS in HotSpot Profile

/ip hotspot profile
set [find name=hsprof1] \
    use-radius=yes \
    radius-accounting=yes \
    radius-interim-update=received \
    radius-mac-authentication=yes

RADIUS profile parameters:

Parameter	Description
`use-radius`	Enable RADIUS authentication for this profile
`radius-accounting`	Send RADIUS accounting packets
`radius-interim-update`	When to send interim accounting updates (`received`, time interval)
`radius-mac-authentication`	Attempt MAC-based authentication before showing login page
`radius-mac-format`	Format of MAC address sent to RADIUS (e.g., `XX:XX:XX:XX:XX:XX`)
`radius-default-domain`	Domain appended to username in Access-Request

MikroTik RADIUS Attributes (VSAs)

RouterOS sends the following Mikrotik Vendor-Specific Attributes to the RADIUS server:

Attribute	Value
`Mikrotik-Rate-Limit`	Bandwidth limit returned by RADIUS
`Mikrotik-Group`	User group assignment
`Mikrotik-Recv-Limit`	Incoming data limit
`Mikrotik-Xmit-Limit`	Outgoing data limit
`Mikrotik-Realm`	HotSpot DNS name

User Manager Integration

RouterOS includes a built-in RADIUS server called User Manager. To use it for HotSpot authentication:

# Enable User Manager and point HotSpot at localhost
/tool user-manager
set enabled=yes

# Add RADIUS entry pointing to User Manager on localhost
/radius
add address=127.0.0.1 \
    service=hotspot \
    secret=um-shared-secret \
    authentication-port=1812 \
    accounting-port=1813

# Enable RADIUS in HotSpot profile
/ip hotspot profile
set [find name=hsprof1] use-radius=yes radius-accounting=yes

FreeRADIUS Configuration Example

For FreeRADIUS, include the MikroTik dictionary and add a user:

guest Cleartext-Password := "guest123"
    Mikrotik-Rate-Limit := "10M/10M",
    Session-Timeout := 3600,
    Reply-Message := "Welcome to guest WiFi"

Walled Garden

The walled garden allows unauthenticated users to reach specific destinations without logging in — useful for splash page assets, payment portals, or company websites.

RouterOS provides two rule sets: the HTTP walled garden (/ip hotspot walled-garden) for matching plain HTTP by hostname and path, and the IP walled garden (/ip hotspot walled-garden ip) for L3/L4 matching that covers HTTPS and any protocol.

# HTTP: allow a domain (plain HTTP only)
/ip hotspot walled-garden
add dst-host=*.example.com action=allow comment="Company site"

# IP: allow HTTPS destination by IP
/ip hotspot walled-garden ip
add dst-address=192.0.2.50 action=accept comment="Payment gateway"

For full coverage of walled garden parameters, wildcard matching, OS captive portal detection, and dynamic RADIUS-based rules, see the Walled Garden guide.

IP Bindings

IP bindings control how specific MAC or IP addresses are handled by HotSpot:

# Bypass authentication for a known device (printer, IP phone)
/ip hotspot ip-binding
add mac-address=AA:BB:CC:DD:EE:FF type=bypassed comment="Office printer"

# Block a specific client permanently
/ip hotspot ip-binding
add address=10.5.50.100 type=blocked comment="Abusive device"

# Register a static IP to a specific user
/ip hotspot ip-binding
add address=10.5.50.50 mac-address=11:22:33:44:55:66 user=staff type=regular

Binding Type	Behavior
`bypassed`	Skip HotSpot authentication entirely
`blocked`	Deny all access
`regular`	Standard HotSpot behavior

HotSpot login pages are HTML files stored in a directory on the router filesystem.

After setup, HotSpot creates a set of HTML templates:

File	Purpose
`login.html`	Main login form
`logout.html`	Logout page
`status.html`	Session status page
`alogin.html`	Redirect page after login
`error.html`	Authentication error page
`rlogin.html`	Redirect to original URL after login

Uploading Custom Pages

Upload custom HTML files to the router using WinBox (drag-and-drop into Files view), FTP, or SCP:

# Upload via SCP
scp login.html [email protected]:/hotspot/

# Or use the router's FTP server
ftp 192.168.1.1
put login.html /hotspot/login.html

Then point the HotSpot profile to the custom directory:

/ip hotspot profile
set [find name=hsprof1] html-override-directory=/hotspot

Template Variables

HotSpot substitutes these variables in HTML templates at render time:

Variable	Description
`$(link-login)`	Login form action URL
`$(link-login-only)`	Login URL without original destination
`$(link-orig)`	Original URL the user was trying to access
`$(link-logout)`	Logout URL
`$(link-status)`	Status page URL
`$(username)`	Authenticated username (on status/logout pages)
`$(ip)`	Client IP address
`$(mac)`	Client MAC address
`$(chap-id)`	CHAP challenge ID (for HTTP-CHAP logins)
`$(chap-challenge)`	CHAP challenge value
`$(session-time-left)`	Remaining session time
`$(bytes-in)`	Bytes downloaded in this session
`$(bytes-out)`	Bytes uploaded in this session

HTTP-CHAP hashes the password client-side before sending, providing some protection even over plain HTTP:

<form name="login" action="$(link-login)" method="post">
  <input type="hidden" name="dst" value="$(link-orig)">
  <input type="hidden" name="popup" value="true">
  <table>
    <tr><td>Username:</td><td><input type="text" name="username"></td></tr>
    <tr><td>Password:</td><td><input type="password" name="password" id="password"></td></tr>
    <tr><td colspan="2"><input type="submit" value="Log In"></td></tr>
  </table>
</form>

Security Considerations

MAC cookies remember authenticated devices to avoid repeated logins on reconnect. Enable per profile:

/ip hotspot user profile
set default add-mac-cookie=yes mac-cookie-timeout=3d

Trial Mode

Allow limited free access before requiring authentication:

/ip hotspot user profile
set default trial-uptime=10m trial-user-limit=1

Rate Limiting

Apply per-user bandwidth limits to prevent abuse:

# Per-user rate limit in user profile
/ip hotspot user profile
add name=limited rate-limit="2M/5M"

# Override rate limit for specific user
/ip hotspot user
set [find name=vip] rate-limit="20M/20M"

Isolate Guest Traffic from LAN

Prevent guest users from accessing the internal LAN:

/ip firewall filter
add chain=forward in-interface=br-guest out-interface=!ether1-WAN \
    action=drop comment="Block guests from LAN"

Troubleshooting

Common Issues

Users not redirected to login page

Verify the HotSpot server is running on the correct interface: /ip hotspot print
Confirm the client received a DHCP lease from the hotspot range
Check that DNS resolves (client must be able to make a DNS request that triggers redirect)
Verify no firewall rules are blocking traffic before HotSpot processes it

RADIUS authentication failing

Test connectivity: /tool ping address=<radius-server>
Verify the shared secret matches on both sides
Check RADIUS logs on the server for rejected requests
Confirm the RADIUS server is listening on the expected ports

HTTPS login certificate errors

Ensure ssl-certificate is set in the HotSpot profile
Verify the certificate CN or SAN matches the HotSpot DNS name (/ip hotspot profile print)
For self-signed certs, users must manually accept the trust exception in their browser
Import the CA certificate into browsers or use a public CA for seamless experience

Users getting logged out frequently

Increase idle-timeout in user profile: /ip hotspot user profile set default idle-timeout=30m
Check for IP address changes (DHCP lease expiry shorter than session timeout)
Review session-timeout in profile

MAC cookie not working after reconnect

Ensure add-mac-cookie=yes in the user profile
Check mac-cookie-timeout is long enough
Verify the client IP doesn’t change between sessions

Debug Commands

# View HotSpot server status
/ip hotspot print

# View all active authenticated sessions
/ip hotspot active print detail

# View HotSpot host table (all detected clients)
/ip hotspot host print

# View HotSpot-related log messages
/log print topic=hotspot

# View user statistics
/ip hotspot user print stats

# Test RADIUS reachability
/tool ping 192.0.2.10

# Check certificate details
/certificate print detail where name=hotspot-cert

Walled Garden — Pre-authentication access rules, HTTPS destinations, OS captive portal detection
User Profiles — Session limits, bandwidth policies, queue integration, and login scripts
RADIUS Integration — Centralised authentication, accounting, MAC auth, VSAs, and FreeRADIUS examples
Wireless Interface — WiFi access point configuration
CAPsMAN — Centralized wireless management
RADIUS — RADIUS client configuration
Firewall Filter — Network filtering
Certificates — Certificate management

HotSpot

HotSpot

Overview

Use Cases

How HotSpot Works

Authentication Flow

Network Architecture

Configuration Paths

Complete Guest WiFi Portal Setup

Step 1: Create Bridge and Add WiFi Interface

Step 2: Assign Gateway IP

Step 3: Configure DHCP

Step 4: Enable DNS for Guests

Step 5: Run the HotSpot Setup Wizard

Step 6: Configure NAT for Internet Access

Step 7: Verify the Setup

HTTPS Redirect and Certificate Requirements

Why HTTPS Matters

Create a Self-Signed Certificate

Import a Trusted Certificate

Assign Certificate to HotSpot Profile

User Management

Local Users

User Profiles

RADIUS Integration

Configure the RADIUS Client

Enable RADIUS in HotSpot Profile

MikroTik RADIUS Attributes (VSAs)

User Manager Integration

FreeRADIUS Configuration Example

Walled Garden

IP Bindings

Customizing Login Pages

Default Login Page Files

Uploading Custom Pages

Template Variables

Example Login Form (HTTP-CHAP)

Security Considerations

MAC Cookie

Trial Mode

Rate Limiting

Isolate Guest Traffic from LAN

Troubleshooting

Common Issues

Debug Commands

Related Documentation