diff --git a/src/service.cr b/src/service.cr
index 36f1e33..3a69a46 100644
--- a/src/service.cr
+++ b/src/service.cr
@@ -61,8 +61,11 @@ class DNSManager::Service < IPC
 		self.service_init @configuration.service_name
 	end
 
-	def get_logged_user(event : IPC::Event)
-		@logged_users[event.fd]?
+	def get_logged_user(fd : Int32) : AuthD::User::Public?
+		@logged_users[fd]?
+	end
+	def get_logged_user(event : IPC::Event) : AuthD::User::Public?
+		get_logged_user event.fd
 	end
 
 	def decode_token(token : String)
@@ -92,6 +95,17 @@ class DNSManager::Service < IPC
 		end
 	end
 
+	# `log_user_info` provides a string composed from either the user
+	# id in case the user was authenticated or the file descriptor of
+	# the connection.
+	def log_user_info(fd : Int32) : String
+		if user = get_logged_user fd
+			"userid #{user.uid}"
+		else
+			"fd #{"%4d" % fd}"
+		end
+	end
+
 	def handle_request(event : IPC::Event)
 		request_start = Time.utc
 
@@ -105,38 +119,39 @@ class DNSManager::Service < IPC
 		end
 
 		reqname = request.class.name.sub /^DNSManager::Request::/, ""
+		connection_info_str = log_user_info event.fd
 
 		response = begin
 			request.handle self, event
 		rescue e : AuthorizationException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} authorization error"
+			Baguette::Log.error "(#{connection_info_str}) #{request} authorization error"
 			Response::Error.new "authorization error"
 		rescue e : DomainNotFoundException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} domain not found"
+			Baguette::Log.error "(#{connection_info_str}) #{request} domain not found"
 			Response::DomainNotFound.new
 		rescue e : CannotCheckPermissionsException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} cannot check permissions of user '#{e.uid}' on resource '#{e.resource}'"
+			Baguette::Log.error "(#{connection_info_str}) #{request} cannot check permissions of user '#{e.uid}' on resource '#{e.resource}'"
 			Response::InsufficientRights.new
 		rescue e : UnknownUserException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} unknown user"
+			Baguette::Log.error "(#{connection_info_str}) #{request} unknown user"
 			Response::UnknownUser.new
 		rescue e : NoOwnershipException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} no ownership error"
+			Baguette::Log.error "(#{connection_info_str}) #{request} no ownership error"
 			Response::NoOwnership.new
 		rescue e : NotLoggedException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} user not logged"
+			Baguette::Log.error "(#{connection_info_str}) #{request} user not logged"
 			Response::Error.new "user not logged"
 		rescue e : RRNotFoundException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} RR not found"
+			Baguette::Log.error "(#{connection_info_str}) #{request} RR not found"
 			Response::RRNotFound.new
 		rescue e : TokenNotFoundException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} Token not found"
+			Baguette::Log.error "(#{connection_info_str}) #{request} Token not found"
 			Response::Error.new "token not found"
 		rescue e : RRReadOnlyException
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} RR is read only"
+			Baguette::Log.error "(#{connection_info_str}) #{request} RR is read only"
 			Response::RRReadOnly.new e.domain, e.rr
 		rescue e # Generic case
-			Baguette::Log.error "(fd #{"%4d" % event.fd}) #{request} generic error #{e}"
+			Baguette::Log.error "(#{connection_info_str}) #{request} generic error #{e}"
 			Response::Error.new "generic error"
 		end
 
@@ -149,10 +164,10 @@ class DNSManager::Service < IPC
 		duration = Time.utc - request_start
 
 		if response.is_a? DNSManager::Response::Error
-			Baguette::Log.warning "fd #{"%4d" % event.fd} (#{duration}) #{request} >> #{response}"
+			Baguette::Log.warning "(#{connection_info_str}) (#{duration}) #{request} >> #{response}"
 		else
 			if reqname != "KeepAlive" || should_display? DNSMESSAGE::KEEPALIVE
-				Baguette::Log.debug "fd #{"%4d" % event.fd} (#{duration}) #{request} >> #{response}"
+				Baguette::Log.debug "(#{connection_info_str}) (#{duration}) #{request} >> #{response}"
 			end
 		end
 	end