• IPsec IKEv1 Algorithms
• Compatibility with VPN servers using weak legacy IPsec IKEv1 algorithms
• Querying VPN server for its IKEv1 algorithm proposals
• Overriding and not just supplementing the default cipher
• "Layer 2 Tunneling Protocol (L2TP)" not showing up
• Unable to save password
• Unable to create or edit a L2TP VPN connection
• strongSwan no acceptable traffic selectors found
• Libreswan algorithm 'modp1024' is not supported error
• Issue with blacklisting of L2TP kernel modules
• Issue with not stopping system xl2tpd service
• Orphaned pppd process
• EAP: peer reports authentication failure
• DNS resolution issues
• DNS not working after disconnecting
• .local hostname resolution
• NetworkManager ≤ 1.6.2 and Systemd-resolved ignoring VPN server's DNS
• Ubuntu AppArmor issue with strongSwan
• openSUSE and SUSE Linux Enterprise Server