if you have an uplink of 1 Gbit/s or less, you can easily solve the problem of ports by purchasing a switch for $3. By the way, there is a mini PC with 4/6/8 ports and even with optical fiber.
and in general, if topic starter build own server, he can just build a router out of it too. the set of programs is not very large: kea-dhcp, radvd, iptables. that’s all. for WiFi, you will need a compatible card in the server or a separate access point like ubiquity.
My provider doesn’t provide IPv6, but I rented a server in a data center, bought a subnet, and tunneled it home via WireGuard. So the scheme is roughly: VPS (fd00:1::/64) <-> (fd00:1::/64) Home router (realv6/64) <-> Home network
Router configuration:
/etc/sysctl.d/10-ipv6-privacy.conf
net.ipv6.conf.all.use_tempaddr = 0 net.ipv6.conf.default.use_tempaddr = 0 net.ipv6.conf.all.forwarding = 1 net.ipv6.conf.default.forwarding = 1/etc/radvd.conf
interface br0 { AdvSendAdvert on; MinRtrAdvInterval 3; MaxRtrAdvInterval 30; AdvManagedFlag on; # M=1 → Address via DHCPv6 AdvOtherConfigFlag on; # O=1 → Additional options via DHCPv6 # SLAAC is still possible for Android prefix realv6::/64 { AdvOnLink on; AdvAutonomous on; # Allow SLAAC }; RDNSS realv6::1 { AdvRDNSSLifetime 1800; }; DNSSL home.lan { AdvDNSSLLifetime 1800; }; };/etc/kea/kea-dhcp6.conf
{ "Dhcp6": { "interfaces-config": { "interfaces": [ "br0" ] }, "lease-database": { "type": "memfile", "persist": true, "lfc-interval": 86400, "name": "/var/lib/kea/dhcp6.leases" }, "renew-timer": 21600, "rebind-timer": 43200, "preferred-lifetime": 43200, "valid-lifetime": 86400, "subnet6": [ { "id": 1, "subnet": "realv6::/64", "interface": "br0", "pools": [ { "pool": "realv6::1000 - realv6::ffff" } ], "option-data": [ { "name": "dns-servers", "data": "realv6::1" }, { "name": "domain-search", "data": "home.lan" } ] } ], "loggers": [ { "name": "kea-dhcp6", "output-options": [ { "output": "stdout" } ], "severity": "WARN" } ] } }And of course, iptables is necessary. Something like: /etc/iptables/ip6tables.rules
# Generated by ip6tables-save v1.6.0 on Thu Sep 8 13:29:11 2016 *nat :PREROUTING ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] COMMIT *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [0:0] #BASE INPUT -A INPUT -i eno1 -j DROP -A OUTPUT -o eno1 -j DROP -A INPUT -i lo -j ACCEPT -A INPUT -i br0 -j ACCEPT -A INPUT -p ipv6-icmp -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -i eno1 -j DROP -A FORWARD -i br0 -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -p ipv6-icmp -j ACCEPT COMMIT