diff --git a/tservice.cpp b/tservice.cpp
index ecdbe7a..71b563a 100644
--- a/tservice.cpp
+++ b/tservice.cpp
@@ -110,14 +110,21 @@ std::expected<void, std::string> TunService::Listen(void) {
 
 void TunService::Handle(int sock) {
         std::string laddr, raddr;
+        bool netFound = false;
         for (auto& net: tunnets) {
                 if (!net.used) {
                         laddr = net.laddr;
                         raddr = net.raddr;
                         net.used = true;
+                        netFound = true;
                         break;
                 }
         }
+        if (!netFound) {
+                uxlogger.Error("Not found free tunnnel network");
+                close(sock);
+                return;
+        }
         uxlogger.Debug("Start socker handler");
         SocketHandler handler;
         handler.Handle(sock, laddr, raddr, localnets);