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hi, i experienced the same issue but when i filled the /etc/resolv.conf with my isp dns ips.
now i have the follow question:
why i can ping to ips and host with no problem... and why i cannot ping my lan hosts? i only can ping to theit lan ips.
it sounds logical... actually last i have other linux server with all the lan hostnames in that file... but my questuion is: since i have DHCP enbabled sometimes the host's ips change and the /etc/hosts file became ambiguous... is there a way to automaticaly mantain updated that file?
You can set up DHCP with dynamic DNS that updates a DNS server (can be the same computer as the DHCP server) If you were able to ping the hosts on your LAN by name before you changed your resolv.conf then this is likely already set up. Once you have a DNS server set up to resolve local hostnames, you also need to set it up to either forward unknown requests to another DNS server or set it up with a root zone "." that points to root DNS servers. This makes it so you can ping hosts on The Internet by name.
why most linux users use a linux box as a dhcp server instead a builtin dhcp of a router or gateway?
-I did it partly to learn how to set it up.
-The "built in dhcp of a router or gateway" on your typical SOHO router doesn't have the functionality and configurability that the Linux daemon does.
-The Linux box that is set up as the DHCP server is also set up as the router as well, so it's really just a PC that replaces those little routers.