Hi i3,
Thanks for running relays! Agreed you will want to run multiple instances to make the most of your host.
The Xeon E5-2620v3 does have AES-NI, which is good.
Other items to consider:
- On most linux/unix systems the ulimits will be set too low by default. On debian-like linux, higher limits for Tor might look like the following in /etc/security/limits.conf:
debian-tor soft nofile 64000 debian-tor hard nofile 64000
- There are a lot of possible syctl tweaks. You could check out https://raw.githubusercontent.com/torservers/server-config-templates/master/.... I use these values on my non-exit relays:
net.core.wmem_max = 12582912 net.core.rmem_max = 12582912 net.ipv4.tcp_rmem = 10240 87380 12582912 net.ipv4.tcp_wmem = 10240 87380 12582912 net.ipv4.conf.default.send_redirects = 1 net.ipv4.conf.all.rp_filter = 0 net.ipv4.conf.all.send_redirects = 0 kernel.sysrq = 0 net.ipv4.icmp_echo_ignore_broadcasts = 1 net.ipv4.conf.all.accept_redirects = 0 net.ipv4.icmp_ignore_bogus_error_responses = 1 net.ipv4.tcp_no_metrics_save = 1 net.ipv4.tcp_moderate_rcvbuf = 1 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_fin_timeout = 4 net.ipv4.tcp_keepalive_time = 60 net.ipv4.tcp_keepalive_intvl = 10 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.ip_local_port_range = 1025 65530 net.core.somaxconn = 20480 net.ipv4.tcp_timestamps = 0 fs.file-max = 64000
- You should install ntp make sure your clock is synced.
- You should install a local DNS resolver (unbound, named, dnsmasq, something along those lines).
This guide has a lot of helpful info: https://www.torservers.net/wiki/setup/server