# use known_hosts for completion
zstyle -e ':completion:*:(ssh|scp|sftp|rsh|rsync):hosts' hosts 'reply=(${=${${(f)"$(cat {/etc/ssh_,~/.ssh/known_}hosts(|2)(N) /dev/null)"}%%[# ]*}//,/ })'

# order stuff
zstyle ':completion:*:(scp|ssh):*' tag-order 'hosts:-host:host hosts:-domain:domain hosts:-ipaddr:ip\ address *'
zstyle ':completion:*:scp:*' group-order users files all-files hosts-domain hosts-host hosts-ipaddr
zstyle ':completion:*:ssh:*' group-order hosts-domain hosts-host users hosts-ipaddr

# ignored patterns
zstyle ':completion:*:*:*:users' ignored-patterns '*'
zstyle ':completion:*:*:*:hosts-host' ignored-patterns '*(.|:)*' loopback ip6-loopback localhost localhost4 localhost6 ip6-localhost broadcasthost
zstyle ':completion:*:*:*:hosts-domain' ignored-patterns '<->.<->.<->.<->' '^[-[:alnum:]]##(.[-[:alnum:]]##)##' '*@*' '*localdomain*' '*.eeleater.org' '*.local' '*.hbz-nrw.de'
zstyle ':completion:*:*:*:hosts-ipaddr' ignored-patterns '^(<->.<->.<->.<->|(|::)([[:xdigit:].]##:(#c,2))##(|%*))' '127.0.0.<->' '255.255.255.255' '::1' 'fe80::*'