Hi, I'm setting up a router (linux, debian-sarge), which shall relay dhcp requests from all subnets to a central DHCP server. The general stuff is solved, i.e. I can ping from any connected machine to any other including the NICs of the router itself. All firewall tables (including nat and mangle) are set to ACCEPT and flushed. On my model system I have the NIC 172.16.1.121 (eth1), which is surtur and also connects to adept the DHCP (172.16.1.7). This net (172.16.1.0) shall be connected to 172.16.2.0 using the other NIC 172.16.2.1 (eth0, not in DNS). Attached to it is my WLAN access point (ymir, 172.16.2.12). And this is what happens: #> dhcrelay -i eth0 adept.mgr #> tcpdump -i any port bootpc or port bootps 09:42:09.996479 172.16.1.12.bootpc > 255.255.255.255.bootps: xid:0x960f0000 flags:0x8000 [|bootp] 09:42:09.997009 surtur.mgr.bootps > adept.mgr.bootps: (request) xid:0x960f0000 flags:0x8000 G:172.16.2.1 ether 0:9:5b:68:19:fb [|bootp] (DF) 09:42:09.997603 adept.mgr.bootps > 172.16.2.1.bootps: (reply) xid:0x960f0000 flags:0x8000 Y:ymir.mgr S:adept.mgr G:172.16.2.1 ether 0:9:5b:68:19:fb [| bootp] (DF) ... but somethink like the following never appears (line taken from DHCP exchange from server installed on router): 09:59:38.780364 172.16.2.1.bootps > 255.255.255.255.bootpc: xid:0x960f0000 flags:0x8000 Y:ymir.mgr S:172.16.2.1 [|bootp] [tos 0x10] Therefore, ymir never gets his IP! Any help appreciated, - lars. _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
