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I want to configure an IP camera which is in my raspberry pi's ethernet port (I connect to it through wifi).

I connected the camera and this is what I see when I run ifconfig

eth0 Link encap:Ethernet HWaddr b8:27:eb:a2:10:08 
 inet addr:169.254.248.2 Bcast:169.254.255.255 Mask:255.255.0.0
 inet6 addr: fe80::ce99:232c:964e:7070/64 Scope:Link
 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
 RX packets:5600 errors:0 dropped:0 overruns:0 frame:0
 TX packets:27715 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000 
 RX bytes:3219770 (3.0 MiB) TX bytes:10481558 (9.9 MiB)

So it means my raspberry pi has the IP address 169.254.248.2. I tried accessing 169.254.248.1 and scanning with nmap 169.254.0.0/16 but the only host up that I see is the raspberry pi itself.

I then run tcpdump on eth0:

tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
03:13:53.963493 IP (tos 0x0, ttl 64, id 13074, offset 0, flags [none], proto UDP (17), length 368)
 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from b8:27:eb:a2:10:08 (oui Unknown), length 340, xid 0x252200b7, secs 65535, Flags [none]
 Client-Ethernet-Address b8:27:eb:a2:10:08 (oui Unknown)
 Vendor-rfc1048 Extensions
 Magic Cookie 0x63825363
 DHCP-Message Option 53, length 1: Discover
 Client-ID Option 61, length 7: ether b8:27:eb:a2:10:08
 SLP-NA Option 80, length 0""
 NOAUTO Option 116, length 1: Y
 MSZ Option 57, length 2: 1500
 Vendor-Class Option 60, length 44: "dhcpcd-6.7.1:Linux-4.9.48-v7+:armv7l:BCM2835"
 Hostname Option 12, length 11: "raspberrypi"
 T145 Option 145, length 1: 1
 Parameter-Request Option 55, length 14: 
 Subnet-Mask, Classless-Static-Route, Static-Route, Default-Gateway
 Domain-Name-Server, Hostname, Domain-Name, BR
 NTP, Lease-Time, Server-ID, RN
 RB, Option 119

Which looks like my raspberry pi is trying to find an IP to itself. I didn't hear anything from the camera. Shouldn't I get its broadcast messages trying to get an IP?

Ok, so I continued and installed https://help.ubuntu.com/community/isc-dhcp-server with the following configuration file:

# Sample /etc/dhcpd.conf
# (add your comments here)
default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
option broadcast-address 169.254.248.255;
option routers 169.254.248.254;
option domain-name "mydomain.example";

subnet 169.254.248.0 netmask 255.255.255.0 
range 169.254.248.10 169.254.248.100;

It should make the dhcp client of the camera request an address and get 169.254.248.10, right?

None of this worked, so I started to remember a few things about this camera:

They come preconfigured to work at 192.168.1.x, and with a fixed IP (which I don't know what is).

Does this mean that the camera will never work at my ethernet port, unless I make the ethernet address be in the 192.168.1.x range?

Shouldn't I receive broadcast messages from the camera, even if I'm on a different subnet and even if its IP is fixed? I think I should received ARP brocadcast messages informing in which IP it is, something like that, right? Yet I don't hear anything coming from the camera when I do tcpdump -i eth0

If the answers to these last two questions are false, then can I make my ethernet port work on the 192.168.1.x range, even though my wlan0 interface is already working on it? (I mean, could I at least do it in a virtual way just to talk with the camera? Since it's raw ethernet, I could fake that eth0 is on 192.168.1.x just to fool the camera). I'm asking this because all I'm doing is remote, I can't mess with the wlan configurations, and can't put it into a different subnet.

With no hub or switch you need to use a crossover cable. You can make a cable that is crossed, make a cable with a female RJ45 connector that is crossed, put 2 RJ45 connectors together (a 2 port hub!), etc.

Once that is done the automatic addressing may work, or check the manual for the camera it may have a default static IP set.

If you know the IP is in the 192.168.1.x subnet, set your Pi to something in that range and then port scan or ping scan the subnet.

ifconfig eth0 192.168.1.131 netmask 255.255.255.0