Update:
I was able to install an earlier version from the mlinux 5.1.8 repository. I’m not sure if that is the best way to install it so we’ll see if it works.
root@mtcdt:~# opkg install http://www.multitech.net/mlinux/feeds/5.1.8/arm926ejste/openvpn_2.3.9-r0.0_arm926ejste.ipk
Downloading http://www.multitech.net/mlinux/feeds/5.1.8/arm926ejste/openvpn_2.3.9-r0.0_arm926ejste.ipk.
Installing openvpn (2.3.9) on root.
Configuring openvpn.
root@mtcdt:~# openvpn –version
OpenVPN 2.3.9 arm-mlinux-linux-gnueabi [SSL (OpenSSL)] [LZO] [EPOLL] [MH] [IPv6] built on Oct 18 2019
library versions: OpenSSL 1.0.2k 26 Jan 2017, LZO 2.09
Originally developed by James Yonan
Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
Compile time defines: enable_crypto=yes enable_crypto_ofb_cfb=yes enable_debug=yes enable_def_auth=yes enable_dependency_tracking=no enable_dlopen=unknown enable_dlopen_self=unknown enable_dlopen_self_static=unknown enable_fast_install=yes enable_fragment=yes enable_http_proxy=yes enable_iproute2=yes enable_libtool_lock=yes enable_lzo=yes enable_lzo_stub=no enable_management=yes enable_multi=yes enable_multihome=yes enable_pam_dlopen=no enable_pedantic=no enable_pf=yes enable_pkcs11=no enable_plugin_auth_pam=yes enable_plugin_down_root=yes enable_plugins=yes enable_port_share=yes enable_selinux=no enable_server=yes enable_shared=yes enable_shared_with_static_runtimes=no enable_silent_rules=no enable_small=no enable_socks=yes enable_ssl=yes enable_static=yes enable_strict=no enable_strict_options=no enable_systemd=no enable_win32_dll=yes enable_x509_alt_username=no with_aix_soname=aix with_broken_putenv=no with_crypto_library=openssl with_gnu_ld=yes with_libtool_sysroot=/mnt/jenkins1/mlinux/mtrv1-linux4/build/tmp/sysroots/mtcdt with_mem_check=no with_plugindir=’$(libdir)/openvpn/plugins’