Paul Howarth wrote: | Claude Jones wrote: || I'm having a problem understanding exactly what DNS servers || should be listed in domain-servers-option - do I list the || servers associated with my ISP? Or do I list the wan nic's IP || address, which has DNS servers associated with its || configuration? | | You list the DNS servers you want your DHCP clients to use to | resolve hostnames. If you're running your own DNS server, even | if only a caching server, I'd use that. Otherwise, your ISP's | nameservers. | || On forwarding and NAT, isn't masquerading only for situations || where your own IP is dynamically assigned each time you || connect? | | No, masquerading is for where the addresses on your LAN are not | to be "seen" by the Internet. This would typically be when you | are using RFC 1918 private addresses for your LAN (e.g. | 192.168.x.x). Whether your (external) Internet address is | static or dynamic doesn't matter. | I'm going backwards! I entered my ISP's DNS servers in the dhcpd.conf file since I don't run my own DNS server. At the same time, I tried to follow the suggestions from the help-file that Alexander posted to configure forwarding and NAT: modprobe iptable_nat iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE #in this case I changed "ppp0" to my gateway IP address service iptables save echo "1" > /proc/sys/net/ipv4/ip_forward Now, I get the following when I try to start DHCP: Can't open lease database /var/lib/dhcp/dhcpd.leases: Permission denied -- check for failed database rewrite attempt! I tried following some suggestions on this error message I found which involved manually flushing the dhcpd.leases and dhcpd.leases~ files, but, my DHCP is still hosed. All suggestions welcome! Claude Jones Levit & James, Inc./WTVS Leesburg, VA, USA
