In web panel there are 2 IPs at least listed once you connect your rig.
1st is you internal IP. In your internal network, you can access it only from your local network.
2nd is your external IP how the server is seeing a client. All your rigs will have the same external IP if the are behind the same router.
Other IPs like IPv6 or VPN will be also listed on the web panel.
When you boot you can spot assigned IP address to your rig.
Later when you boot it's also shown when you login.
To inspect you network interface you could run ifconfig and have a result like this
[email protected]:~# ifconfig
eth0 Link encap:Ethernet HWaddr 88:d7:f6:c7:51:db
inet addr:192.168.0.188 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::8ad7:f6ff:fec7:51db/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:209463 errors:0 dropped:18 overruns:0 frame:0
TX packets:186047 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:56751586 (56.7 MB) TX bytes:27763156 (27.7 MB)
In this way you could check DHCP assigned address.