One network cannot ping hosts on another via ipsec

do you have this configured?

https://wiki.ipfire.org/configuration/services/ipsec/hub-and-spoke#changes-to-the-basic-ipsec-configuration

do you have these firewall rules on each of your IPFire devices?

https://wiki.ipfire.org/configuration/services/ipsec/hub-and-spoke#firewall-rules-to-add-to-headquarters

Steven, initially that was the case but I changed the modemā€™s IP scheme to be 10.1.2.1, that didnā€™t fix it.

I worked with a friend to set up a new IPsec tunnel between my remote office and his office, and after they connected they could both ping inside each otherā€™s LAN. So I know the problem is not the remote office ISP modem or the remote office router, the problem is in the main office router. Iā€™m done for the day on this issue, Iā€™ll pick this up Monday, thank you everyone for the troubleshooting suggestions.

Iā€™ll check on these Monday

Iā€™ll respond with all the info Monday, Iā€™m out of the office now.