userdoc:tt-ext-dhcp-server-old [AstLinux Documentation]

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====== DHCP-Server on the external interface (EXTIF) - old version ======

!!Note: AstLinux 1.1.0 or OLDER is required!!

To use dnsmasq as a DHCP-server on the external interface (EXTIF), or if you have only one NIC (e.g. in a VM),\\ 
you need to add the following configuration:
 
in ''dnsmasq.static'' as an example, assuming a network of 192.168.30.0/24 and NIC static IPv4 address of 192.168.30.10:

<code>dhcp-authoritative
read-ethers
dhcp-leasefile=/var/db/dnsmasq.leases

dhcp-range=ext,192.168.30.128,192.168.30.250,24h
dhcp-option=ext,option:router,192.168.30.10
dhcp-option=ext,option:dns-server,192.168.30.10
dhcp-option=ext,option:tftp-server,"192.168.30.10"
dhcp-option=ext,150,192.168.30.10  # TFTP server Cisco
dhcp-option=ext,option:ntp-server,192.168.30.10
</code>

**Firewall**

If you use the firewall (AIF), you also need to add the following variable to your ''user.conf'':

  EXTERNAL_DHCP_SERVER=1
  
to allow external services, you need to open the respective ports (e.g. DNS, TFTP, NTP) with "Pass EXT->Local". \\
DHCP traffic is already allowed through this variable.

 
\\