I have connected a HikVision camera to a raspberry pi through two ethernet power line adapters TP-Link TL-PA4010.
I have configured the eth0 interface of the raspberry to have a static ip address. In /etc/dhcpcd.conf:
interface eth0
static ip_address=192.168.0.10/24
I have configured a DHCP server using dnsmasq, with the following configuration:
# Disable DNS
port=0
# Configuring the DHCP server
interface=eth0
dhcp-leasefile=/var/lib/misc/dnsmasq.leases
# The MAC address of the IP camera
dhcp-host=xx:xx:xx:xx:xx:xx,192.168.0.11
# I've added this later, didn't do anything
dhcp-authoritative
# Some logging
log-dhcp
log-queries
log-facility=/var/log/dnsmasq.log
This setup worked briefly and I could get images from it. But now the camera will not connect: cannot get an IP. It connects correctly to my home network and I can load the camera's web page. Tried to reset the camera to the factory default and reconfiguring it for DHCP but no luck.
Tried to capture packet going through eth0 using tcmdump and I see some trafic from the camera, something relative to router solicitation and a bunch of other stuff but I also see:
17:46:36.725552 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from xx:xx:xx:xx:xx:xx (oui Unknown), length 284
17:46:39.726180 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from xx:xx:xx:xx:xx:xx (oui Unknown), length 284
17:46:42.727918 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from xx:xx:xx:xx:xx:xx (oui Unknown), length 284
I have filtered the logs with dhcpdump and that's all I see, among the other traffic on eth0 these are the only DHCP related.
But no answer from dnsmasq. Nothing in dnsmasq's logs:
Apr 29 17:33:57 dnsmasq[590]: started, version 2.85 DNS disabled
Apr 29 17:33:57 dnsmasq[590]: compile time options: IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset auth cryptohash DNSSEC loop-detect inotify dumpfile
I have removed the lease file (/var/lib/dhcp/dhclient.leases) which initially contained an entry from my previous successful attempt following something I read on the net.
The service is running correctly:
● dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
Loaded: loaded (/lib/systemd/system/dnsmasq.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2023-04-29 17:33:57 CEST; 15min ago
Process: 538 ExecStartPre=/etc/init.d/dnsmasq checkconfig (code=exited, status=0/SUCCESS)
Process: 570 ExecStart=/etc/init.d/dnsmasq systemd-exec (code=exited, status=0/SUCCESS)
Process: 594 ExecStartPost=/etc/init.d/dnsmasq systemd-start-resolvconf (code=exited, status=0/SUCCESS)
Main PID: 590 (dnsmasq)
Tasks: 1 (limit: 779)
CPU: 435ms
CGroup: /system.slice/dnsmasq.service
└─590 /usr/sbin/dnsmasq -x /run/dnsmasq/dnsmasq.pid -u dnsmasq -r /run/dnsmasq/resolv.conf -7 /etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new --local-service --trust-anchor=.,20326,8,2,e06d44b80b8f1d3>
Apr 29 17:33:55 raspberrypi systemd[1]: Starting dnsmasq - A lightweight DHCP and caching DNS server...
Apr 29 17:33:57 raspberrypi systemd[1]: Started dnsmasq - A lightweight DHCP and caching DNS server.
I think the problem comes from the raspberry from the fact that:
- we see traffic so the PL adapters are working
- the camera can get an IP from the my internet gateway's DHCP server
The raspberry runs a raspbian (Debian GNU/Linux 11 (bullseye)) which is pretty standard. There is no firewall (at least as far as I know).
pi@raspberrypi:~ $ sudo systemctl stop firewall
Failed to stop firewall.service: Unit firewall.service not loaded.
I've come to my wit's end here. Any idea of what could be the problem? What I could investigate further?
