Dhcp App For Mac
See also:DNS and DHCP configuration /etc/config/dhcp,DNS encryption,DNS hijacking
Introduction
MacOS Server has a DHCP server and other services, but none of them actually share the mac's internet connection in any way, nor can they be used to control or add those features to the native macOS's internet sharing feature mentioned above. Question: Q: Setting up Mac OS X as a DHCP server I want to be able to sit on a plane and connect my Raspberry Pi to My Mac on a private local network for software development on the Pi. I have tried to follow this to set it up but failed (my ip address was still an unassigned one).
This is a DHCP client app that makes it easy to send and receive DHCP messages on the network where device is currently connected and inspect. The Clients tab of the DHCP service pane is used to manage statically assigned IP addresses to nodes based on the MAC address on the network card (Figure G).
This guide provides most common dnsmasq and odhcpd tuning scenarios adapted for OpenWrt.
Instructions
Static leases
Add a fixed IPv4 address 192.168.1.22 and name mydesktop for a machine with the MAC address 00:11:22:33:44:55.
This is equivalent to (in /etc/config/dhcp):
Add a fixed IPv4 address 192.168.1.23, IPv6 interface identifier (address suffix) 23 and name mylaptop for a machine with the MAC address 11:22:33:44:55:66 or aa:bb:cc:dd:ee:ff and DUID 000100004fd454041c6f65d26f43.
Samsung ml 5100a drivers for mac. Reconnect your clients to apply the changes.
If you plan to connect more than one interface simultaneously, add a separate host entry for each interface, otherwise it's unreliable.
See also: odhcpd leases
Race conditions with netifd
MAC filtering
If you want to distribute IPv4 addresses to known clients only (static leases), use:
With this, dnsmasq will consider static leases defined in “config host” blocks and in /etc/ethers, and refuse to hand out any IPv4 address to unknown clients.
Note that you shouldn't use this as a security feature to prevent unwanted clients from connecting.A client can simply configure a static IP in the right range to have access to the network.
DHCP options
DHCP options can be configured under via dhcp_option.Use an alternative default gateway, DNS server and NTP server.
A list of options can be found here.
Client classifying and individual options
An example using the mac classifier to create a tagged network for VPN to assign different DHCP options.Use custom default gateway and DNS, disable WINS.
Assign different DHCP options to multiple hosts.
DHCP pool for a large network
255.0.0.0- network mask10.22.0.254- pool end253- limit offset
Domains
This is an implementation of the --host-record option.Define a custom domain name and the corresponding PTR record - assigns the IPv4 address 192.168.1.23 and IPv6 address fdce::23 to the domain name mylaptop and construct an appropriate reverse records.You can also use this to rebind domain names.It works like an entry in /etc/hosts but more flexible and integrated.
A and AAAA RR
This is an implementation of the --address option.Return 10.10.10.1 on query domain home and subdomain *.home.
SRV RR
This is an implementation of the --srv-host option.Define an SRV record for SIP over UDP, with the default port of 5060 on the host pbx.mydomain.com, with a class of 0 and a weight of 10.
CNAME RR
This is an implementation of the --cname option.A Canonical Name record specifes that a domain name is an alias for another domain, the “canonical” domain.Specify that the FTP server is on the same host as the web server.
Note that it is necessary to use fully qualified domain names.
MX RR
This is an implementation of the --mx-host option.If you're running the mail server for your domain behind a firewall (and therefore, with split-horizon for your own domain) then you might need to convince that mailer that it's actually authoritative for your domain.
If sendmail tells you “Domain of sender address xxx@yyy.zzz does not exist” this is because it isn't finding an MX record confirming that it's an MX relay for that domain.
Mitigate the issues caused by split-horizon: Rfhutil download windows.
TFTP boot
Direct BOOTP requests to the TFTP server.Tell the client to load pxelinux.0 from the server at 192.168.1.2, and mount root from /data/netboot/root on the same server.
Multiple DHCP/DNS server/forwarder instances
If you need multiple DNS forwarders with different configurations or DHCP server with different sets of lease files.
Running multiple dnsmasq instances as DNS forwarder and/or DHCPv4 server, each having their own configuration and lease list can be configured by creating multiple dnsmasq sections.Typically in such configs each dnsmasq section will be bound to a specific interface by using the interface list; assigning sections like dhcp, host, etc. to a specific dnsmasq instance is done by the instance option.By default dnsmasq adds the loopback interface to the interface list to listen when the --interface option is used; therefore the loopback interface needs to be excluded in one of the dnsmasq instances by using the notinterface list.
These are example settings for multiple dnsmasq instances each having their own dhcp section.dnsmasq instance lan_dns is bound to the lan interface while the dnsmasq instance guest_dns is bound to the guest interface.
The LuCI web interface has not been updated to support multiple dnsmasq instances.
Disabling DHCP role
This change turns off DHCP on the specified interface but leaves DNS services available.
Disabling DNS role
This is useful when you just want to hand out addresses to clients, without doing any DNS by dnsmasq.
Replacing dnsmasq with odhcpd and Unbound
Remove dnsmasq and use odhcpd for both DHCP and DHCPv6.
Use Unbound for DNS.
Dhcp Server Software For Mac
Providing custom DNS with DHCP
Send custom DNS servers with DHCP.
Reconnect your clients to apply the changes.
DNS forwarding
Forward DNS queries to specific servers.
Disable resolvfile option limiting upstream resolvers to server option.Also makes local system to not use dnsmasq.
Enforcing dnsmasq for local system
Enforce local system to use dnsmasq if it is running with noresolv option.Beware of race condition with Adblock service when using DNS encryption.
Dhcp App For Mac Catalina
Selective DNS forwarding
Forward DNS queries for a specific domain and all its subdomains to a different server.More specific domains take precedence over less specific domains allowing to combine with unconditional DNS forwarding from above.
DNS filtering
Simple DNS-based content filtering.
See also:Ad blocking,DNS-based firewall with IP sets
Race conditions with sysntpd
Resolve the race condition with sysntpd service.When running dnsmasq with noresolv and localuse options and using DNS encryption for local system.
Upstream DNS provider
OpenWrt uses peer DNS servers as the upstream DNS provider for dnsmasq by default.These are typically provided by the upstream DHCP server.You can change them to any other DNS provider or even to a different local DNS server you have running already in your network.Make sure selected provider supports DNSSEC validation if required.Specify several servers to improve fault tolerance.
Dhcp App For Macbook
Multiple DNS providers
- The more DNS providers, the higher the fault tolerance of your DNS relative to DoS.
- Different DNS providers may return different answers to a DNS query due to differences in caching, synchronization, load balancing, content filtering, etc.
- To distinguish between correct and incorrect answers such as false-negatives you need to utilize DNSSEC which may affect performance.
Peer DNS options
- Keep peer DNS enabled to improve your DNS fault tolerance.
- Disable peer DNS to prevent DNS leak if you have configured a VPN connection on OpenWrt.
- Disable peer DNS to actually change your DNS provider and receive more predictable DNS replies.