how to change isc-dhcp3-server replies?

[Joe]

I found out where my dhcp offers are going.  It seems my dhcp offers are being sent out my external port instead of my internal port.

Anyone ever have a problem where the internal port is setup as a server and for some reason natd kicked in and sent the data out using the external ip?

Thanks, 
Joe

> Ok, no so true. I am watching tcpdump output from the two binaries. The
    > old binary sends its reply to 255.255.255.255, while the new one sends its
    > reply to 192.168.0.15. Same config file and I tried the always-broadcast
    > flag, and it only sets the bit for the client, but the server still
    > broadcasts its reply to the client on the subnet mask.
    >
    > Old client reply (ml.. is server af is client):
    >
    > 1188694380.961642 ml:ml:ml:ml:ml:ml > ff:ff:ff:ff:ff:ff, ethertype IPv4
    > (0x0800), length 342: (tos 0x10, ttl 16, id 0, offset 0, flags [none],
    > proto: UDP (17), length: 328) 192.168.0.15.67 > 255.255.255.255.68:
    > BOOTP/DHCP, Reply, length: 300, xid:0x77915dc3, flags: [Broadcast] (0x8000)
    > Your IP: 192.168.0.13
    > Client Ethernet Address: af:af:af:af:af:af [|bootp]
    >
    > new client does not do this and clients do not get their ip address. I read
    > somewhere that linux had a problem doing this in 2.2 kernels and it has
    > something to do with the routing table in linux. Not sure what is going on
    > here, but the routing table looks fine.
       
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