diff --git a/src/iface.cc b/src/iface.cc
index 00a7c0f..3af0c88 100644
--- a/src/iface.cc
+++ b/src/iface.cc
@@ -564,7 +564,7 @@ void iface::handle_reverse_advert(const address& saddr, const std::string& ifnam
         for (std::list<ptr<rule> >::iterator it = parent->rules_begin(); it != parent->rules_end(); it++) {
             ptr<rule> ru = *it;
 
-            if (ru->addr() == saddr &&
+            if (ru->addr() == saddr && ru->daughter() &&
                 ru->daughter()->name() == ifname)
             {
                 logger::debug() << " - generating artifical advertisement: " << ifname;
@@ -664,7 +664,7 @@ int iface::poll_all()
         if (is_pfd) {
             size = ifa->read_solicit(saddr, daddr, taddr);
             if (size < 0) {
-                logger::error() << "Failed to read from interface '%s'", ifa->_name.c_str();
+                logger::error() << "Failed to read from interface '" << ifa->_name.c_str() << "'";
                 continue;
             } 
             if (size == 0) {
@@ -703,7 +703,7 @@ int iface::poll_all()
         } else {
             size = ifa->read_advert(saddr, taddr);
             if (size < 0) {
-                logger::error() << "Failed to read from interface '%s'", ifa->_name.c_str();
+                logger::error() << "Failed to read from interface '" << ifa->_name.c_str() << "'";
                 continue;
             }
             if (size == 0) {
diff --git a/src/session.cc b/src/session.cc
index 4a2465c..b1e1ef1 100644
--- a/src/session.cc
+++ b/src/session.cc
@@ -209,7 +209,11 @@ void session::handle_auto_wire(const address& saddr, const std::string& ifname,
         logger::debug()
             << "session::system(" << route_cmd.str() << ")";
         
-        system(route_cmd.str().c_str());
+        int ret = system(route_cmd.str().c_str());
+        if (ret != 0) {
+           logger::error()
+                << "system(" << route_cmd.str().c_str() << ") failed, return " << ret;
+        }
         
         _wired_via = saddr;
     }
@@ -233,7 +237,11 @@ void session::handle_auto_wire(const address& saddr, const std::string& ifname,
         logger::debug()
             << "session::system(" << route_cmd.str() << ")";
 
-        system(route_cmd.str().c_str());
+        int ret = system(route_cmd.str().c_str());
+        if (ret != 0) {
+            logger::error()
+                << "system(" << route_cmd.str().c_str() << ") failed, return " << ret;
+        }
     }
     
     _wired = true;
@@ -261,7 +269,11 @@ void session::handle_auto_unwire(const std::string& ifname)
         logger::debug()
             << "session::system(" << route_cmd.str() << ")";
 
-        system(route_cmd.str().c_str());
+        int ret = system(route_cmd.str().c_str());
+        if (ret != 0) {
+            logger::error()
+                << "system(" << route_cmd.str().c_str() << ") failed, return " << ret;
+        }
     }
     
     if (_wired_via.is_empty() == false) {
@@ -277,7 +289,11 @@ void session::handle_auto_unwire(const std::string& ifname)
         logger::debug()
             << "session::system(" << route_cmd.str() << ")";
 
-        system(route_cmd.str().c_str());
+        int ret = system(route_cmd.str().c_str());
+        if (ret != 0) {
+            logger::error()
+                << "system(" << route_cmd.str().c_str() << ") failed, return " << ret;
+        }
     }
     
     _wired = false;