Mikrotik dhcp setup winbox

Since 6. The vendor class is used by DHCP clients to optionally identify the vendor and configuration. In the following configuration example, we will give an IP address from a particular pool for an Android based mobile phone. Then in the logging entries, you will see Class-ID. From MikroTik Wiki. Navigation menu Personal tools Log in. Namespaces Manual Discussion. Views Read View source View history.

Main Page Recent changes. Whether to add dynamic ARP entry. IP pool , from which to take IP addresses for the clients. If set to static-only , then only the clients that have a static lease added in lease submenu will be allowed. Always send replies as broadcasts even if destination IP is known. Will add additional load on L2 network. Accepts two predefined options or time value: forever - lease never expires lease-time - use time from lease-time parameter. Specifies whether to limit specific number of clients per single MAC address or leave unlimited.

Note that this setting should not be used in relay setups. If option is enabled, then whenever server tries to assign a lease it will send ICMP and ARP messages to detect whether such address in the network already exist. If any of above get reply address is considered already used. Conflict detection must be disabled when any kind of DHCP client limitation per port or per mac is used.

If secs field in DHCP packet is smaller than delay-threshold, then this packet is ignored. If set to none - there is no threshold all DHCP packets are processed. Specify where to place dynamic simple queue entries for static DCHP leases with rate-limit parameter set.

Script that will be executed after lease is assigned or de-assigned. Internal "global" variables that can be used in the script: leaseBound - set to "1" if bound, otherwise set to "0" leaseServerName - dhcp server name leaseActMAC - active mac address leaseActIP - active IP address lease-hostname - client hostname lease-options - array of received options.

The time that a client may use the assigned address. By default mac server runs on all interfaces, so we will disable default all entry and add a local interface to disallow MAC connectivity from the WAN port. MAC Telnet Server feature allows you to apply restrictions to the interface "list". Then, add your previously created bridge named "local" to the interface list:. Apply newly created "list" of interfaces to the MAC server:.

MikroTik Neighbor discovery protocol is used to show and recognize other MikroTik routers in the network. Disable neighbor discovery on public interfaces:. Besides the fact that the firewall protects your router from unauthorized access from outer networks, it is possible to restrict username access for the specific IP address. IP connectivity on the public interface must be limited in the firewall. In case if a public interface is a pppoe, then the in-interface should be set to "pppoe-out".

The first two rules accept packets from already established connections, so we assume those are OK to not overload the CPU. The third rule drops any packet which connection tracking thinks is invalid.

After that, we set up typical accept rules for specific protocols. Although the firewall protects the router from the public interface, you may still want to disable RouterOS services. Change default service ports, this will immediately stop most of the random SSH brute force login attempts:.

Additionally, each service can be secured by allowed IP address or address range the address service will reply to , although more preferred method is to block unwanted access in firewall because the firewall will not even allow to open socket.

A bandwidth server is used to test throughput between two MikroTik routers. Disable it in the production environment. A router might have DNS cache enabled, which decreases resolving time for DNS requests from clients to remote servers. In case DNS cache is not required on your router or another router is used for such purposes, disable it. It is good practice to disable all unused interfaces on your router, in order to decrease unauthorized access to your router.

Following services are disabled by default, nevertheless, it is better to make sure that none of then were enabled accidentally:. At this point, PC is not yet able to access the Internet, because locally used addresses are not routable over the Internet. Remote hosts simply do not know how to correctly reply to your local address. The solution for this problem is to change the source address for outgoing packets to routers public IP.

This can be done with the NAT rule:. Another benefit of such a setup is that NATed clients behind the router are not directly connected to the Internet, that way additional protection against attacks from outside mostly is not required.

Some client devices may need direct access to the internet over specific ports. For example, a client with an IP address If you have set up strict firewall rules then RDP protocol must be allowed in the firewall filter forward chain.

Since 6. The vendor class is used by DHCP clients to optionally identify the vendor and configuration. In the following configuration example, we will give an IP address from a particular pool for an Android-based mobile phone. Configure vendor-class-id matcher. DHCP servers configuration remains the default. Then in the logging entries, you will see Class-ID.

To simply configure DHCP server you can use a setup command. Then you use setup a command which will automatically ask necessary parameters:. To configure the DHCP server manually to respond to local requests you have to configure the following:.

Let us consider that you have several IP networks 'behind' other routers, but you want to keep all DHCP servers on a single router. For networks Pages Blog. Page tree. Browse pages. A t tachments 1 Page History. Jira links. IP addresses assigned statically are not probed! If set to static-only , then only the clients that have a static lease added in lease submenu will be allowed.

Will add additional load on L2 network. Note that this setting should not be used in relay setups. If the option is enabled, then whenever the server tries to assign a lease it will send ICMP and ARP messages to detect whether such address in the network already exists.

If any of the above get reply address is considered already used. Conflict detection must be disabled when any kind of DHCP client limitation per port or per mac is used.

Internal "global" variables that can be used in the script: leaseBound - set to "1" if bound, otherwise set to "0" leaseServerName - DHCP server name leaseActMAC - active mac address leaseActIP - active IP address lease-hostname - client hostname lease-options - an array of received options lease-time time ; Default: 10m The time that a client may use the assigned address.

The client will try to renew this address after half of this time and will request a new address after the time limit expires. If there is only one static address on the DHCP server interface and the source address is left as 0. If there are multiple addresses on the interface, an address in the same subnet as the range of given addresses should be used.

DHCP Option capwap will be used. If set to '0' - netmask from network address will be used.