Hi,I assume that your VPN application is written in C++. The default C++ standard Library on FreeBSD is libc++ and the default compiler is clang. libstdc++ is rather a gcc related. gcc is afaik not part of the OPNsense standard ports tree. gcc is indeed part of a standard FreeBSD ports tree.Br br
I need to make one correction: you could install gcc which is in /usr/ports/lang/gcc and then you should also have a libstdc++ sorry for that mistake, corrected it above