Regarding dhcp server behavior
dhcp1 at thehobsons.co.uk
Sat Mar 23 11:29:51 UTC 2019
Shweta Jogi <Shweta.Jogi at Sophos.com> wrote:
> Command to start Relay :
> sudo dhcrelay -d -i enp0s3 -i enp0s8 220.127.116.11
> So my server is running on enp0s8, but I am not able to see any packets coming to DHCP Server.
Can't see packets according to dhcpd logs, or can't see packets when using a packet sniffing tool (eg tcpdump or wireshark) ?
By default, the dhcp server uses raw packets because it needs to handle broadcast traffic from clients on local networks. For this reason, packet handling is a bit different from most network connected programs - and I suspect it's just ignoring packets sent to 18.104.22.168 or just not seeing them at all. You can change this by turning off a setting (something related to "use raw packets") and recompiling - then the server will just use the normal IP stack (but won't be able to handle local, ie not relayed, clients).
I suspect that in your case, you just need to change your relay invocation to send packets to 22.214.171.124 - the dhcp server will be listening on this interface and will see the packet.
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