diff --git a/examples/directchat.nim b/examples/directchat.nim
index 8e5d066..472fc07 100644
--- a/examples/directchat.nim
+++ b/examples/directchat.nim
@@ -175,7 +175,7 @@ proc processInput(rfd: AsyncFD) {.async.} =
     result = newMplex(conn)
 
   let mplexProvider = newMuxerProvider(createMplex, MplexCodec)
-  let transports = @[Transport(newTransport(TcpTransport))]
+  let transports = @[Transport(TcpTransport.init())]
   let muxers = [(MplexCodec, mplexProvider)].toTable()
   let identify = newIdentify(peerInfo)
   let secureManagers = [(SecioCodec, Secure(newSecio(seckey)))].toTable()
diff --git a/libp2p/standard_setup.nim b/libp2p/standard_setup.nim
index 2709ad3..2d53b1f 100644
--- a/libp2p/standard_setup.nim
+++ b/libp2p/standard_setup.nim
@@ -5,7 +5,7 @@ const
   libp2p_pubsub_verify {.booldefine.} = true
 
 import
-  options, tables,
+  options, tables, chronos,
   switch, peer, peerinfo, connection, multiaddress,
   crypto/crypto, transports/[transport, tcptransport],
   muxers/[muxer, mplex/mplex, mplex/types],
@@ -26,7 +26,7 @@ proc newStandardSwitch*(privKey = none(PrivateKey),
                         gossip = false,
                         verifySignature = libp2p_pubsub_verify,
                         sign = libp2p_pubsub_sign,
-                        transportFlags: TransportFlags = {}): Switch =
+                        transportFlags: set[ServerFlags] = {}): Switch =
   proc createMplex(conn: Connection): Muxer =
     result = newMplex(conn)
 
@@ -34,7 +34,7 @@ proc newStandardSwitch*(privKey = none(PrivateKey),
     seckey = privKey.get(otherwise = PrivateKey.random(ECDSA).tryGet())
     peerInfo = PeerInfo.init(seckey, [address])
     mplexProvider = newMuxerProvider(createMplex, MplexCodec)
-    transports = @[Transport(newTransport(TcpTransport, transportFlags))]
+    transports = @[Transport(TcpTransport.init(transportFlags))]
     muxers = {MplexCodec: mplexProvider}.toTable
     identify = newIdentify(peerInfo)
   when libp2p_secure == "noise":
diff --git a/libp2p/transports/tcptransport.nim b/libp2p/transports/tcptransport.nim
index ccab6d6..06a55e6 100644
--- a/libp2p/transports/tcptransport.nim
+++ b/libp2p/transports/tcptransport.nim
@@ -26,6 +26,7 @@ type
   TcpTransport* = ref object of Transport
     server*: StreamServer
     clients: seq[StreamTransport]
+    flags: set[ServerFlags]
     cleanups*: seq[Future[void]]
     handlers*: seq[Future[void]]
 
@@ -91,7 +92,11 @@ proc connCb(server: StreamServer,
         # shouldn't happen but..
         warn "Error closing connection", err = err.msg
 
-method init*(t: TcpTransport) =
+proc init*(T: type TcpTransport, flags: set[ServerFlags] = {}): T =
+  result = T(flags: flags)
+  result.initTransport()
+
+method initTransport*(t: TcpTransport) =
   t.multicodec = multiCodec("tcp")
 
   inc getTcpTransportTracker().opened
@@ -134,7 +139,7 @@ method listen*(t: TcpTransport,
   discard await procCall Transport(t).listen(ma, handler) # call base
 
   ## listen on the transport
-  t.server = createStreamServer(t.ma, connCb, transportFlagsToServerFlags(t.flags), t)
+  t.server = createStreamServer(t.ma, connCb, t.flags, t)
   t.server.start()
 
   # always get the resolved address in case we're bound to 0.0.0.0:0
diff --git a/libp2p/transports/transport.nim b/libp2p/transports/transport.nim
index 68f7f85..09eaa18 100644
--- a/libp2p/transports/transport.nim
+++ b/libp2p/transports/transport.nim
@@ -17,34 +17,15 @@ import ../connection,
 type
   ConnHandler* = proc (conn: Connection): Future[void] {.gcsafe.}
 
-  TransportFlag* {.pure.} = enum
-    ReuseAddr
-
-  TransportFlags* = set[TransportFlag]
-
   Transport* = ref object of RootObj
     ma*: Multiaddress
     handler*: ConnHandler
     multicodec*: MultiCodec
-    flags*: TransportFlags
 
-proc transportFlagsToServerFlags*(flags: TransportFlags): set[ServerFlags] {.gcsafe.} =
-  let transportFlagToServerFlagMapping = {
-      TransportFlag.ReuseAddr: ServerFlags.ReuseAddr,
-    }.toTable()
-
-  for flag in flags:
-    result.incl(transportFlagToServerFlagMapping[flag])
-
-method init*(t: Transport) {.base, gcsafe.} =
+method initTransport*(t: Transport) {.base, gcsafe, locks: "unknown".} =
   ## perform protocol initialization
   discard
 
-proc newTransport*(t: typedesc[Transport], flags: TransportFlags = {}): t {.gcsafe.} =
-  new result
-  result.flags = flags
-  result.init()
-
 method close*(t: Transport) {.base, async, gcsafe.} =
   ## stop and cleanup the transport
   ## including all outstanding connections
diff --git a/tests/testidentify.nim b/tests/testidentify.nim
index 951a527..f4cf037 100644
--- a/tests/testidentify.nim
+++ b/tests/testidentify.nim
@@ -34,11 +34,11 @@ suite "Identify":
       proc connHandler(conn: Connection): Future[void] {.async, gcsafe.} =
         await msListen.handle(conn)
 
-      var transport1 = newTransport(TcpTransport)
+      var transport1 = TcpTransport.init()
       serverFut = await transport1.listen(ma, connHandler)
 
       let msDial = newMultistream()
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       var peerInfo = PeerInfo.init(PrivateKey.random(RSA).get(), [ma])
@@ -78,11 +78,11 @@ suite "Identify":
         await conn.close()
         done.complete()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       asyncCheck transport1.listen(ma, connHandler)
 
       let msDial = newMultistream()
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       var localPeerInfo = PeerInfo.init(PrivateKey.random(RSA).get(), [ma])
diff --git a/tests/testinterop.nim b/tests/testinterop.nim
index 137bcea..9f04a1d 100644
--- a/tests/testinterop.nim
+++ b/tests/testinterop.nim
@@ -71,7 +71,7 @@ proc createNode*(privKey: Option[PrivateKey] = none(PrivateKey),
   var peerInfo = NativePeerInfo.init(seckey.get(), [Multiaddress.init(address)])
   proc createMplex(conn: Connection): Muxer = newMplex(conn)
   let mplexProvider = newMuxerProvider(createMplex, MplexCodec)
-  let transports = @[Transport(newTransport(TcpTransport))]
+  let transports = @[Transport(TcpTransport.init())]
   let muxers = [(MplexCodec, mplexProvider)].toTable()
   let identify = newIdentify(peerInfo)
   let secureManagers = [(SecioCodec, Secure(newSecio(seckey.get())))].toTable()
diff --git a/tests/testmplex.nim b/tests/testmplex.nim
index 6641ff3..ad13e7c 100644
--- a/tests/testmplex.nim
+++ b/tests/testmplex.nim
@@ -229,10 +229,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -267,10 +267,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -312,10 +312,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -352,10 +352,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -393,10 +393,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1 = newTransport(TcpTransport)
+      let transport1 = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -436,10 +436,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -477,10 +477,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
@@ -545,10 +545,10 @@ suite "Mplex":
         await mplexListen.handle()
         await mplexListen.close()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let mplexDial = newMplex(conn)
diff --git a/tests/testmultistream.nim b/tests/testmultistream.nim
index 38c4caf..bbee017 100644
--- a/tests/testmultistream.nim
+++ b/tests/testmultistream.nim
@@ -260,11 +260,11 @@ suite "Multistream select":
         await conn.close()
         handlerWait2.complete()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       asyncCheck transport1.listen(ma, connHandler)
 
       let msDial = newMultistream()
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       check (await msDial.select(conn, "/test/proto/1.0.0")) == true
@@ -304,7 +304,7 @@ suite "Multistream select":
       msListen.addHandler("/test/proto1/1.0.0", protocol)
       msListen.addHandler("/test/proto2/1.0.0", protocol)
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       proc connHandler(conn: Connection): Future[void] {.async, gcsafe.} =
         await msListen.handle(conn)
         handlerWait.complete()
@@ -312,7 +312,7 @@ suite "Multistream select":
       asyncCheck transport1.listen(ma, connHandler)
 
       let msDial = newMultistream()
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       let ls = await msDial.list(conn)
@@ -348,11 +348,11 @@ suite "Multistream select":
       proc connHandler(conn: Connection): Future[void] {.async, gcsafe.} =
         await msListen.handle(conn)
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       asyncCheck transport1.listen(ma, connHandler)
 
       let msDial = newMultistream()
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       check (await msDial.select(conn,
@@ -388,11 +388,11 @@ suite "Multistream select":
       proc connHandler(conn: Connection): Future[void] {.async, gcsafe.} =
         await msListen.handle(conn)
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       asyncCheck transport1.listen(ma, connHandler)
 
       let msDial = newMultistream()
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
 
       check (await msDial.select(conn, @["/test/proto2/1.0.0", "/test/proto1/1.0.0"])) == "/test/proto2/1.0.0"
diff --git a/tests/testnoise.nim b/tests/testnoise.nim
index 937cd53..59b9e4e 100644
--- a/tests/testnoise.nim
+++ b/tests/testnoise.nim
@@ -58,7 +58,7 @@ proc createSwitch(ma: MultiAddress; outgoing: bool): (Switch, PeerInfo) =
     result = newMplex(conn)
 
   let mplexProvider = newMuxerProvider(createMplex, MplexCodec)
-  let transports = @[Transport(newTransport(TcpTransport))]
+  let transports = @[Transport(TcpTransport.init())]
   let muxers = [(MplexCodec, mplexProvider)].toTable()
   let secureManagers = [(NoiseCodec, Secure(newNoise(peerInfo.privateKey, outgoing = outgoing)))].toTable()
   let switch = newSwitch(peerInfo,
@@ -88,11 +88,11 @@ suite "Noise":
         await sconn.write(cstring("Hello!"), 6)
 
       let
-        transport1: TcpTransport = newTransport(TcpTransport)
+        transport1: TcpTransport = TcpTransport.init()
       asyncCheck await transport1.listen(server, connHandler)
 
       let
-        transport2: TcpTransport = newTransport(TcpTransport)
+        transport2: TcpTransport = TcpTransport.init()
         clientInfo = PeerInfo.init(PrivateKey.random(RSA).get(), [transport1.ma])
         clientNoise = newNoise(clientInfo.privateKey, outgoing = true)
         conn = await transport2.dial(transport1.ma)
@@ -130,11 +130,11 @@ suite "Noise":
         readTask.complete()
 
       let
-        transport1: TcpTransport = newTransport(TcpTransport)
+        transport1: TcpTransport = TcpTransport.init()
       asyncCheck await transport1.listen(server, connHandler)
 
       let
-        transport2: TcpTransport = newTransport(TcpTransport)
+        transport2: TcpTransport = TcpTransport.init()
         clientInfo = PeerInfo.init(PrivateKey.random(RSA).get(), [transport1.ma])
         clientNoise = newNoise(clientInfo.privateKey, outgoing = true)
         conn = await transport2.dial(transport1.ma)
@@ -173,11 +173,11 @@ suite "Noise":
         readTask.complete()
 
       let
-        transport1: TcpTransport = newTransport(TcpTransport)
+        transport1: TcpTransport = TcpTransport.init()
       asyncCheck await transport1.listen(server, connHandler)
 
       let
-        transport2: TcpTransport = newTransport(TcpTransport)
+        transport2: TcpTransport = TcpTransport.init()
         clientInfo = PeerInfo.init(PrivateKey.random(RSA).get(), [transport1.ma])
         clientNoise = newNoise(clientInfo.privateKey, outgoing = true)
         conn = await transport2.dial(transport1.ma)
diff --git a/tests/testswitch.nim b/tests/testswitch.nim
index caa4d7e..31cf31c 100644
--- a/tests/testswitch.nim
+++ b/tests/testswitch.nim
@@ -39,7 +39,7 @@ proc createSwitch(ma: MultiAddress): (Switch, PeerInfo) =
     result = newMplex(conn)
 
   let mplexProvider = newMuxerProvider(createMplex, MplexCodec)
-  let transports = @[Transport(newTransport(TcpTransport))]
+  let transports = @[Transport(TcpTransport.init())]
   let muxers = [(MplexCodec, mplexProvider)].toTable()
   let secureManagers = [(SecioCodec, Secure(newSecio(peerInfo.privateKey)))].toTable()
   let switch = newSwitch(peerInfo,
@@ -174,11 +174,11 @@ suite "Switch":
   #       readTask.complete()
 
   #     let
-  #       transport1: TcpTransport = newTransport(TcpTransport)
+  #       transport1: TcpTransport = TcpTransport.init()
   #     asyncCheck await transport1.listen(server, connHandler)
 
   #     let
-  #       transport2: TcpTransport = newTransport(TcpTransport)
+  #       transport2: TcpTransport = TcpTransport.init()
   #       clientInfo = PeerInfo.init(PrivateKey.random(RSA), [transport1.ma])
   #       clientNoise = newSecio(clientInfo.privateKey)
   #       conn = await transport2.dial(transport1.ma)
diff --git a/tests/testtransport.nim b/tests/testtransport.nim
index 72376a7..2cdb5d6 100644
--- a/tests/testtransport.nim
+++ b/tests/testtransport.nim
@@ -23,7 +23,7 @@ suite "TCP transport":
         await conn.close()
         handlerWait.complete()
 
-      let transport: TcpTransport = newTransport(TcpTransport)
+      let transport: TcpTransport = TcpTransport.init()
 
       asyncCheck transport.listen(ma, connHandler)
 
@@ -51,7 +51,7 @@ suite "TCP transport":
         await conn.close()
         handlerWait.complete()
 
-      let transport: TcpTransport = newTransport(TcpTransport)
+      let transport: TcpTransport = TcpTransport.init()
       asyncCheck await transport.listen(ma, connHandler)
       let streamTransport: StreamTransport = await connect(transport.ma)
       let sent = await streamTransport.write("Hello!", 6)
@@ -83,7 +83,7 @@ suite "TCP transport":
       server.start()
 
       let ma: MultiAddress = MultiAddress.init(server.sock.getLocalAddress())
-      let transport: TcpTransport = newTransport(TcpTransport)
+      let transport: TcpTransport = TcpTransport.init()
       let conn = await transport.dial(ma)
       var msg = newSeq[byte](6)
       await conn.readExactly(addr msg[0], 6)
@@ -120,7 +120,7 @@ suite "TCP transport":
       server.start()
 
       let ma: MultiAddress = MultiAddress.init(server.sock.getLocalAddress())
-      let transport: TcpTransport = newTransport(TcpTransport)
+      let transport: TcpTransport = TcpTransport.init()
       let conn = await transport.dial(ma)
       await conn.write(cstring("Hello!"), 6)
       result = true
@@ -145,10 +145,10 @@ suite "TCP transport":
         await conn.close()
         handlerWait.complete()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       asyncCheck transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
       var msg = newSeq[byte](6)
       await conn.readExactly(addr msg[0], 6)
@@ -175,10 +175,10 @@ suite "TCP transport":
         await conn.close()
         handlerWait.complete()
 
-      let transport1: TcpTransport = newTransport(TcpTransport)
+      let transport1: TcpTransport = TcpTransport.init()
       asyncCheck transport1.listen(ma, connHandler)
 
-      let transport2: TcpTransport = newTransport(TcpTransport)
+      let transport2: TcpTransport = TcpTransport.init()
       let conn = await transport2.dial(transport1.ma)
       await conn.write(cstring("Hello!"), 6)