diff --git a/caddy.go b/caddy.go
index ff578d12..b0ec1af6 100644
--- a/caddy.go
+++ b/caddy.go
@@ -76,7 +76,7 @@ type Instance struct {
 	context Context
 
 	// servers is the list of servers with their listeners.
-	servers []serverListener
+	servers []ServerListener
 
 	// these callbacks execute when certain events occur
 	onFirstStartup  []func() error // starting, not as part of a restart
@@ -86,6 +86,9 @@ type Instance struct {
 	onFinalShutdown []func() error // stopping, not as part of a restart
 }
 
+// Servers returns the ServerListeners in i.
+func (i *Instance) Servers() []ServerListener { return i.servers }
+
 // Stop stops all servers contained in i. It does NOT
 // execute shutdown callbacks.
 func (i *Instance) Stop() error {
@@ -202,7 +205,7 @@ func (i *Instance) Restart(newCaddyfile Input) (*Instance, error) {
 // internally-kept list of servers that is running. For
 // saved servers, graceful restarts will be provided.
 func (i *Instance) SaveServer(s Server, ln net.Listener) {
-	i.servers = append(i.servers, serverListener{server: s, listener: ln})
+	i.servers = append(i.servers, ServerListener{server: s, listener: ln})
 }
 
 // HasListenerWithAddress returns whether this package is
@@ -644,7 +647,7 @@ func startServers(serverList []Server, inst *Instance, restartFds map[string]res
 			errChan <- s.ServePacket(pc)
 		}(s, ln, pc, inst)
 
-		inst.servers = append(inst.servers, serverListener{server: s, listener: ln, packet: pc})
+		inst.servers = append(inst.servers, ServerListener{server: s, listener: ln, packet: pc})
 	}
 
 	// Log errors that may be returned from Serve() calls,
@@ -836,7 +839,7 @@ var (
 	instancesMu sync.Mutex
 )
 
-const (
+var (
 	// DefaultConfigFile is the name of the configuration file that is loaded
 	// by default if no other file is specified.
 	DefaultConfigFile = "Caddyfile"
diff --git a/plugins.go b/plugins.go
index 5134aa91..bf137170 100644
--- a/plugins.go
+++ b/plugins.go
@@ -82,13 +82,31 @@ func ValidDirectives(serverType string) []string {
 	return stype.Directives
 }
 
-// serverListener pairs a server to its listener and/or packetconn.
-type serverListener struct {
+// ServerListener pairs a server to its listener and/or packetconn.
+type ServerListener struct {
 	server   Server
 	listener net.Listener
 	packet   net.PacketConn
 }
 
+// LocalAddr returns the local network address of the packetconn. It returns
+// nil when it is not set.
+func (s ServerListener) LocalAddr() net.Addr {
+	if s.packet == nil {
+		return nil
+	}
+	return s.packet.LocalAddr()
+}
+
+// Addr returns the listener's network address. It returns nil when it is
+// not set.
+func (s ServerListener) Addr() net.Addr {
+	if s.listener == nil {
+		return nil
+	}
+	return s.listener.Addr()
+}
+
 // Context is a type which carries a server type through
 // the load and setup phase; it maintains the state
 // between loading the Caddyfile, then executing its