You probably have no worry about antivirus programs; as for VPN, there is at least one in the repositories.
Code:
apt show openvpn
Package: openvpn
Version: 2.4.7-1ubuntu1
Priority: optional
Section: net
Origin: Ubuntu
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Original-Maintainer: Bernhard Schmidt <berni@debian.org>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 1,171 kB
Depends: debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.15), liblz4-1 (>= 0.0~r130), liblzo2-2, libpam0g (>= 0.99.7.1), libpkcs11-helper1 (>= 1.11), libssl1.1 (>= 1.1.1), libsystemd0, iproute2, lsb-base (>= 3.0-6)
Suggests: openssl, resolvconf, openvpn-systemd-resolved, easy-rsa
Homepage: https://openvpn.net/
Task: ubuntu-desktop-minimal, ubuntu-desktop, ubuntu-mate-core, ubuntu-mate-desktop, ubuntu-budgie-desktop
Supported: 9m
Download-Size: 477 kB
APT-Sources: http://us.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
Description: virtual private network daemon
OpenVPN is an application to securely tunnel IP networks over a
single UDP or TCP port. It can be used to access remote sites, make
secure point-to-point connections, enhance wireless security, etc.
.
OpenVPN uses all of the encryption, authentication, and certification
features provided by the OpenSSL library (any cipher, key size, or
HMAC digest).
.
OpenVPN may use static, pre-shared keys or TLS-based dynamic key exchange. It
also supports VPNs with dynamic endpoints (DHCP or dial-up clients), tunnels
over NAT or connection-oriented stateful firewalls (such as Linux's iptables).
TheFu is absent tonight, but he will probably have some good advice to share about VPN.
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