diff -Nru avahi-0.7/debian/avahi-daemon-check-dns.sh avahi-0.7/debian/avahi-daemon-check-dns.sh
--- avahi-0.7/debian/avahi-daemon-check-dns.sh	2018-04-28 06:39:23.000000000 +0800
+++ avahi-0.7/debian/avahi-daemon-check-dns.sh	2018-08-21 14:56:18.000000000 +0800
@@ -73,7 +73,8 @@
     fi
   fi
 
-  OUT=`LC_ALL=C host -t soa local. 2>&1`
+  # Use timeout when calling host as workaround for LP: #1752411
+  OUT=`LC_ALL=C timeout 5 host -t soa local. 2>&1`
   if [ $? -eq 0 ] ; then
     if echo "$OUT" | egrep -vq 'has no|not found'; then
       return 0
diff -Nru avahi-0.7/debian/changelog avahi-0.7/debian/changelog
--- avahi-0.7/debian/changelog	2018-05-04 15:53:20.000000000 +0800
+++ avahi-0.7/debian/changelog	2018-08-21 14:56:18.000000000 +0800
@@ -1,3 +1,12 @@
+avahi (0.7-4ubuntu2) cosmic; urgency=medium
+
+  * /usr/lib/avahi/avahi-daemon-check-dns.sh: On some hardware, the 'host'
+    command gets stuck and does not timeout as it should leaving this script
+    and boot-up hanging indefinitely. Launch host with 'timeout' to kill it
+    after 5 seconds in these cases as a workaround. (LP #1752411)
+
+ -- Trent Lloyd <trent.lloyd@canonical.com>  Tue, 21 Aug 2018 14:56:18 +0800
+
 avahi (0.7-4ubuntu1) cosmic; urgency=low
 
   * Merge from Debian unstable.  Remaining changes: