Has anyone had to prep their ubuntu 20.04 servers to run the agent and server? (for example)

sudo swapoff -a
sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

systemctl stop ufw
systemctl disable ufw

create file /etc/sysctl.d/90-rke2.conf
net.ipv4.conf.all.forwarding=1
net.ipv6.conf.all.forwarding=1

modify /etc/resolv.conf
nameserver from 127.0.0.53 to 8.8.8.8
search from <http://attlocal.net|attlocal.net> to <http://my.domain.com|my.domain.com>

yes and other OS's as well (their equivalent)

Thanks! is this about what you do as well for the agents and server?

So the short version is: • Disable swap on all servers • Disable firewall on all servers I never had need to enable ip forwarding. What you enable or disable in sysctl is up to you (here is a copy of my lab environment)

kernel.randomize_va_space=2

net.ipv4.ip_forward=0

kernel.sysrq=0

vm.panic_on_oom=1

kernel.dmesg_restrict=1

kernel.kptr_restrict=2

net.ipv4.conf.all.send_redirects=0

net.ipv4.conf.default.send_redirects=0

net.ipv4.conf.all.accept_source_route=0

net.ipv4.route.flush=1

net.ipv4.conf.all.accept_redirects=0

net.ipv4.conf.all.secure_redirects=0

net.ipv4.conf.all.forwarding=0

net.ipv4.conf.default.forwarding=0

net.ipv4.conf.all.log_martians=1

net.ipv4.conf.default.log_martians=1

net.ipv4.icmp_echo_ignore_broadcasts=1

net.ipv4.tcp_timestamps=0

net.ipv4.tcp_syncookies=1

net.ipv4.tcp_syn_retries=5

net.ipv4.tcp_synack_retries=2

net.ipv4.conf.all.rp_filter=1

net.ipv4.conf.default.rp_filter=1

net.ipv4.icmp_ignore_bogus_error_responses=1

net.ipv4.tcp_keepalive_time=300

net.ipv4.tcp_keepalive_probes=6

net.ipv4.tcp_keepalive_intvl=15

net.ipv6.conf.all.disable_ipv6=1

net.ipv6.conf.default.disable_ipv6=1

net.ipv6.conf.lo.disable_ipv6=1

fs.suid_dumpable=0

net.ipv4.icmp_echo_ignore_all=0