--- nmap/tcpip.cc
+++ nmap/tcpip.cc
@@ -2694,8 +2694,8 @@ bool setTargetNextHopMAC(Target *target) {
   /* OK, the last choice is to send our own damn ARP request (and
      retransmissions if necessary) to determine the MAC */
   target->SourceSockAddr(&srcss, NULL);
-  if (doArp(target->deviceName(), target->SrcMACAddress(), &srcss, &targetss, 
-	    mac)) {
+  if (doArp(target->deviceFullName(), target->SrcMACAddress(),
+	    &srcss, &targetss, mac)) {
     NmapArpCache(ARPCACHE_SET, &targetss, mac);
     target->setNextHopMACAddress(mac);
     return true;
@@ -3143,6 +3143,16 @@ static struct sys_route *getsysroutes_proc(FILE *routefp, int *howmany) {
         break;
       }
     }
+    /* If device name in the route file does not match any interface, then
+       try to find at least an alias of interface that matches. */
+    if (i == numifaces) {
+      for(i=0; i < numifaces; i++) {
+        if (!strcmp(iface, ifaces[i].devname)) {
+          routes[numroutes].device = &ifaces[i];
+          break;
+        }
+      }
+    }
     if (i == numifaces) {
       error("Failed to find device %s which was referenced in /proc/net/route", iface);
       continue;
--- nmap/idle_scan.cc
+++ nmap/idle_scan.cc
@@ -406,7 +406,7 @@ static void initialize_idleproxy(struct idle_proxy_info *proxy, char *proxyName,
   Snprintf(filter, sizeof(filter), "tcp and src host %s and dst host %s and src port %hu", p, q, proxy->probe_port);
  free(p); 
  free(q);
- set_pcap_filter(proxy->host.deviceName(), proxy->pd,  filter);
+ set_pcap_filter(proxy->host.deviceFullName(), proxy->pd,  filter);
 /* Windows nonsense -- I am not sure why this is needed, but I should
    get rid of it at sometime */
 
--- nmap/osscan2.cc
+++ nmap/osscan2.cc
@@ -3266,7 +3266,7 @@ static void begin_sniffer(HostOsScan *HOS, vector<Target *> &Targets) {
   filterlen = len;
     
   if (o.debugging > 2) log_write(LOG_PLAIN, "Pcap filter: %s\n", pcap_filter);
-  set_pcap_filter(Targets[0]->deviceName(), HOS->pd, pcap_filter);
+  set_pcap_filter(Targets[0]->deviceFullName(), HOS->pd, pcap_filter);
   
   return;
 }
--- nmap/scan_engine.cc
+++ nmap/scan_engine.cc
@@ -5071,7 +5071,7 @@ static void begin_sniffer(UltraScanInfo *USI, vector<Target *> &Targets) {
     }
   }else assert(0);
   if (o.debugging > 2) log_write(LOG_PLAIN, "Pcap filter: %s\n", pcap_filter.c_str());
-  set_pcap_filter(Targets[0]->deviceName(), USI->pd, pcap_filter.c_str());
+  set_pcap_filter(Targets[0]->deviceFullName(), USI->pd, pcap_filter.c_str());
   /* pcap_setnonblock(USI->pd, 1, NULL); */
   return;
 }