@dominikhoffmann said in Surprising amount of ping chatter on LAN:
192.168.1.x is my wired LAN, and 192.168.4.x is my wireless LAN. Both are bridged together.
Huh? You don't bridge together different L3 networks?
But generally no - devices on a network don't just randomly ping other IPs on the network. A device might ping its gateway, it might ping some external IP to validate its got internet access.
A client might ping a server it talks to for some services. If your running say HAproxy on pfsense it might ping the backends you have setup to validate they are online to send data too..
But no you don't normally see some device pinging .X and then .Y and then .Z etc.. unless its a device meant to do that.. Some sort of monitoring device to check what is on your network, etc.