OPKG software install woes

[JDL]

root@squirrel:~# opkg update
Downloading http://downloads.openwrt.org/releases/packages-19.07/mips_24kc/base/Packages.gz
Updated list of available packages in /var/opkg-lists/1907_base
Downloading http://downloads.openwrt.org/releases/packages-19.07/mips_24kc/base/Packages.sig
Signature check passed.
Downloading http://downloads.openwrt.org/releases/packages-19.07/mips_24kc/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/1907_packages
Downloading http://downloads.openwrt.org/releases/packages-19.07/mips_24kc/packages/Packages.sig
Signature check passed.
root@squirrel:~# opkg install ebtables
Installing ebtables (2018-06-27-48cff25d-1) to root...
Downloading http://downloads.openwrt.org/releases/packages-19.07/mips_24kc/base/ebtables_2018-06-27-48cff25d-1_mips_24kc.ipk
Collected errors:
 * satisfy_dependencies_for: Cannot satisfy the following dependencies for ebtables:
 * 	kmod-ebtables
 * opkg_install_cmd: Cannot install package ebtables.
root@squirrel:~# opkg install kmod-ebtables
Unknown package 'kmod-ebtables'.
Collected errors:
 * opkg_install_cmd: Cannot install package kmod-ebtables.
root@squirrel:~# opkg install arptables
Installing arptables (2015-05-20-f4ab8f63-1) to root...
Downloading http://downloads.openwrt.org/releases/packages-19.07/mips_24kc/base/arptables_2015-05-20-f4ab8f63-1_mips_24kc.ipk
Collected errors:
 * satisfy_dependencies_for: Cannot satisfy the following dependencies for arptables:
 * 	kmod-arptables
 * opkg_install_cmd: Cannot install package arptables.
root@squirrel:~# opkg install kmod-arptables
Unknown package 'kmod-arptables'.
Collected errors:
 * opkg_install_cmd: Cannot install package kmod-arptables.
root@squirrel:~# exit

Having the above issue installing software on firmware 3.1.  These are some critical packages for the way the Squirrel is used. Any advice / support for this?