Lighttpd vhost config.

cat /etc/lighttpd/conf-available/10-vhost.conf
server.modules += ( "mod_openssl" )
 
$SERVER["socket"] == "[2404:9400:213c:6b01:0000:0000:0000:0001]:443" {
        ssl.engine  = "enable"
        ssl.privkey= "/etc/letsencrypt/live/1.mygeekvps.net/privkey.pem"
        ssl.pemfile = "/etc/letsencrypt/live/1.mygeekvps.net/cert.pem"
        ssl.ca-file= "/etc/letsencrypt/live/1.mygeekvps.net/chain.pem"
        ssl.cipher-list = "HIGH"
        server.document-root        = "/var/www/html1"
}
 
$SERVER["socket"] == "[2404:9400:213c:6b01:0000:0000:0000:0002]:443" {
        ssl.engine  = "enable"
        ssl.privkey= "/etc/letsencrypt/live/2.mygeekvps.net/privkey.pem"
        ssl.pemfile = "/etc/letsencrypt/live/2.mygeekvps.net/cert.pem"
        ssl.ca-file= "/etc/letsencrypt/live/2.mygeekvps.net/chain.pem"
        ssl.cipher-list = "HIGH"
        server.document-root        = "/var/www/html2"
}
 
$SERVER["socket"] == "[2404:9400:213c:6b01:0000:0000:0000:0003]:443" {
        ssl.engine  = "enable"
        ssl.privkey= "/etc/letsencrypt/live/3.mygeekvps.net/privkey.pem"
        ssl.pemfile = "/etc/letsencrypt/live/3.mygeekvps.net/cert.pem"
        ssl.ca-file= "/etc/letsencrypt/live/3.mygeekvps.net/chain.pem"
        ssl.cipher-list = "HIGH"
        server.document-root        = "/var/www/html3"
}

IPv6 additional addresses.

/etc/network/interfaces

iface eth0 inet6 static
address 2404:9400:213c:6b01:0000:0000:0000:0001/128
# use SLAAC to get global IPv6 address from the router
# we may not enable ipv6 forwarding, otherwise SLAAC gets disabled
autoconf 1
accept_ra 2
 
iface eth0 inet6 static
address 2404:9400:213c:6b01:0000:0000:0000:0002/128
# use SLAAC to get global IPv6 address from the router
# we may not enable ipv6 forwarding, otherwise SLAAC gets disabled
autoconf 1
accept_ra 2
 
iface eth0 inet6 static
address 2404:9400:213c:6b01:0000:0000:0000:0003/128
# use SLAAC to get global IPv6 address from the router
# we may not enable ipv6 forwarding, otherwise SLAAC gets disabled
autoconf 1
accept_ra 2