Hi Clive, > Problem is trying to ensure that the IP address is issued to the > required MAC address.
I think you're trying to have the ADSL router dish out IP addresses to those that come asking by DHCP from your LAN, but have the DHCP server always give a known IP address to the same MAC address, and possibly refuse to give an IP address to any unknown MAC address. Whether that's possible with the TalkTalk router's GUI, I don't know. You might just have to poke around lots, or ask on a TalkTalk forum. As James said, arp(8) might be useful. The https://en.wikipedia.org/wiki/Address_Resolution_Protocol is used by a machine to find the MAC address for the IP address it's trying to contact. Linux builds an ARP table over time of the recent IP addresses and their corresponding MAC addresses that it has seen on the network. `arp -a' lists this table. You could encourage it to have more entries by ping(8)ing IP addresses before hand. ping -c 3 192.168.0.42 arp -a Or a broadcast ping to the network. (The ping might need a sudo.) ping -b -c 3 192.168.0.255 arp -a Peter's advice is another option. Ditch the centralised allocation of IP address for MAC address on the router and configure each device to use a distinct static IP address instead. Moving the range dished out by the DHCP server out of the way of the range you've used for the static ones. The downside is you no longer have a single view of what devices exist. Cheers, Ralph. -- Next meeting at *new* venue: Bournemouth, Tuesday, 2018-10-02 20:00 Check if you're replying to the list or the author Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
