Date: Sun, 1 Feb 2004 15:24:05 -0500 From: "Edward Carmody" <ecarmody@shoregroup.com> To: <freebsd-questions@freebsd.org> Subject: FW: FBSD router/firewall with dhclient & dhcpd Message-ID: <007a01c3e901$5a4ada80$3268a8c0@edsdell8200>
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Hi, I'm trying to replace my Linksys router/firewall/nat box with a FreeBSD box...I'm in the configuring/testing phase before I put it into production... My *potential* problem is that my ISP (Cablevision) re-addresses their DNS servers often. My question is: is there a way to dynamically update the "option domain-name-servers" values in dhcpd.conf from the "nameserver" values my ISP-facing, dhclient-using interface is writing into "resolv.conf"? Or, more simply, how can my DHCP server hand out *known-fresh-and-good* ISP dns server addresses gathered from the wan-facing dhcp client?? The linksys box I have now does this auto-magically... ;-) Info the FreeBSD box: -FreeBSD Oberon 5.1-RELEASE FreeBSD 5.1-RELEASE #0: Thu Jun 5 02:55:42 GMT 2003 root@wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GEN ERIC i386 -I have dhclient running correctly on my to-be-ISP-facing interface (tested using a Cisco 2620 as dhcp server); -I have dhcpd running correctly on my LAN-facing interface (currently serving all home LAN clients); -I have verified that routed is exchanging RIP updates with an internal Cisco 2620 (I run multiple VLANs internally); will have to get VLANs running on FreeBSD later... -I think natd is set up correctly, haven't tested yet; -I have ipfw running full-open for internal testing on home LAN. All help is appreciated...thanks! Ed C.
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