On Saturday 12 January 2002 13:01 pm, Joel Hammer wrote: > This change over to dynamic IP's has been anything but easy. >
Not that you want to hear this, but I was present when a friend of mine switched from dialup to a cable modem. I had the same trepidations about getting Linux to work with the DHCP stuff. Of course, the installers just diddled with Windows and off they went. This friend runs SuSE 7.2 and it took me all of two minutes to get the configuration tool (YAST2) to get the system to use a dynamic IP. I was impressed. (But now you know a lot more about dhcp than I do.... :o) > It has taken me several days to get this straightened out. So, I'll pass it > along. > > I was using @HOME with a static IP. I use register.com to maintain my > domain hammershome.com, which points to my static ip. With comcast, > there are no static ip's, so, here is what happened. First, to get the > dynamic ip from comcast, you need to include a -h parameter. I used > my old @HOME name, but I don't think it matters. Any name might do. > You can't use the -H parameter. > > So: > dhcpcd -d -h somehostname eth1 > Works. > > This puts your parameters into /var/run/dhcpcd-eth1.info. It creates a > /etc/resolv.conf.dhcp which contains your new domain name and name servers. > And it saves your old /etc/resolv.conf in /etc/resolv.conf.dhcp.sv. > This is all you can count on dhcpcd doing. > It doesn't: > 1. Change /etc/resolv.conf. > 2. It doesn't configure your card. > 3. It doesn't set up routes. > 4. It doesn't change your host name. > > For example, my new /etc/resolv.conf.dhcp contains the following: > # > # Generated by dhcpcd from DHCP server information. > # > domain towson01.md.pvcomcast.net > nameserver 68.34.76.5 > nameserver 68.34.76.6 > > This might work for some, but since I run a local name server, I had to > change the domain name and add my own name server, like so: > domain hammershome.com > nameserver 192.168.0.2 > nameserver 68.34.76.5 > nameserver 68.34.76.6 > > Now, dhcpcd is supposed to keep running, keeping up a communication with > the dhcp server and maybe even configuring your route. However, comcast > gives an infinite lease (see more below) and so dhcpcd exits after getting > the lease. > > So, you have to configure your card and set up your own default route > in your network startup script, like so: > > . /var/run/dhcpcd-eth1.info > /sbin/ifconfig eth1 down > /sbin/ifconfig eth1 $IPADDR netmask $NETMASK broadcast $BROADCAST > /sbin/route add -net default gw $GATEWAY eth1 > > This all was easy. The hard part was the host name. I thought my computer > should have a host name recognized by comcast, so, running host against > my new ip number like so: > > host 68.33.14.228 > 228.14.33.68.IN-ADDR.ARPA domain name pointer > pcp364928pcs.towson01.md.pvcomcast.net > > I got the huge host name starting with pcp above. Now, with @HOME, this > huge host name (static) was resolvable on the internet. (cc8846558-a > was my old @HOME name. Boy, I sure miss it.) I used it for my host > name. I assumed this new name would be resolvable, too, and changed all > occurences of cc884558-a to the new name. Bad choice. This new name is > NOT resolvable on the internet, and many bad things happen to your email, > when your host name cannot be resolved. > > So, I redid my hostname to hammershome.com, and, for now, things seem to be > working. > > Now, about those infinite leases. I am not sure what that means. After I > got my first lease using my old cc846 name, I tried getting another lease > with my new pcp... name, and got a new ip number. So, I just don't know > what their servers are doing. Maybe if you always use the same host name > you will get the same lease ip. I haven't got the energy to test this right > now. It takes about 8 hours for register.com to update my ip, so I don't > feel like trying out various names and seeing what I get. > > Joel > > Joel > > > Joel > > _______________________________________________ > Linux-users mailing list > Archives, Digests, etc at http://linux.nf/mailman/listinfo/linux-users -- +----------------------------------------------------------------------------+ + Bruce S. Marshall [EMAIL PROTECTED] Bellaire, MI 01/12/02 13:25 + +----------------------------------------------------------------------------+ "Peace may cost as much as war, but it is a better buy." - Anonymous _______________________________________________ Linux-users mailing list Archives, Digests, etc at http://linux.nf/mailman/listinfo/linux-users
