diff --git a/lib/xmon/ssh.rb b/lib/xmon/ssh.rb
new file mode 100644
index 0000000..dd9c0c3
--- /dev/null
+++ b/lib/xmon/ssh.rb
@@ -0,0 +1,36 @@
+require "net/ssh"
+
+module Xmon
+  class SSH < TCP
+    def initialize(parent, *args, **kwargs)
+      @parent = parent
+      @address = parent.address
+      @port = args[0]
+      @dsl_id = @port
+      define_attributes([:version, :keys])
+      super
+    end
+
+    def key(value)
+      @keys ||= []
+      @keys << value
+    end
+
+    def fetch(host, port = 22)
+      s = Net::SSH::Transport::Session.new(host)
+      {
+        version: s.server_version.version,
+        keys: s.host_keys.entries.map { |pkey| [Net::SSH::Buffer.from(:key, pkey).to_s].pack("m*").gsub(/\s/, "") }
+      }
+    end
+
+    def check
+      puts "checking SSH for #{@address} #{@host} #{@port}"
+      current = fetch(@address, @port)
+      r = []
+      r << compare(:version, @version, current[:version]) if @version
+      r << compare(:keys, @keys, current[:keys]) if @keys
+      r
+    end
+  end
+end