diff -Nru iperf-2.0.10+dfsg1/debian/changelog iperf-2.0.10+dfsg1/debian/changelog
--- iperf-2.0.10+dfsg1/debian/changelog	2018-06-05 16:48:25.000000000 +0000
+++ iperf-2.0.10+dfsg1/debian/changelog	2019-06-17 19:16:49.000000000 +0000
@@ -1,3 +1,12 @@
+iperf (2.0.10+dfsg1-1ubuntu0.18.04.2) bionic; urgency=medium
+
+  * Add backlog_increase.patch to fix hangs and connection resets
+    with high thread count. LP: #1832399.
+  * Add signal_bug.patch to fix issue with the server not exiting
+    via SIGINT. LP: #1832401.
+
+ -- dann frazier <dann.frazier@canonical.com>  Mon, 17 Jun 2019 13:16:49 -0600
+
 iperf (2.0.10+dfsg1-1ubuntu0.18.04.1) bionic; urgency=medium
 
   * fix for: iperf2 long time run on 40Gb/s NIC crashes (LP: #1771283)
diff -Nru iperf-2.0.10+dfsg1/debian/patches/backlog_increase.patch iperf-2.0.10+dfsg1/debian/patches/backlog_increase.patch
--- iperf-2.0.10+dfsg1/debian/patches/backlog_increase.patch	1970-01-01 00:00:00.000000000 +0000
+++ iperf-2.0.10+dfsg1/debian/patches/backlog_increase.patch	2019-06-17 19:16:22.000000000 +0000
@@ -0,0 +1,32 @@
+From: Robert McMahon <rjmcmahon@rjmcmahon.com>
+Subject: [PATCH] increase listen backlog limit to much larger value
+Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=930386
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1832399
+Last-Update: 2019-06-11
+Applied-Upstream: https://sourceforge.net/p/iperf2/code/ci/4565c2ce318318a8a1d4578bab78c0e03fb49437/
+[ dannf: Removed incidental version number changes from commit ]
+
+Index: iperf-2.0.10+dfsg1/src/Listener.cpp
+===================================================================
+--- iperf-2.0.10+dfsg1.orig/src/Listener.cpp
++++ iperf-2.0.10+dfsg1/src/Listener.cpp
+@@ -73,6 +73,7 @@
+ 
+ #define HEADERS()
+ 
++#include <limits.h>
+ #include "headers.h"
+ #include "Listener.hpp"
+ #include "SocketAddr.h"
+@@ -367,9 +368,9 @@ void Listener::Listen( ) {
+         FAIL_errno( rc == SOCKET_ERROR, "bind", mSettings );
+     }
+     // listen for connections (TCP only).
+-    // default backlog traditionally 5
++    // use large (INT_MAX) backlog allowing multiple simultaneous connections
+     if ( !isUDP( mSettings ) ) {
+-        rc = listen( mSettings->mSock, 5 );
++	rc = listen( mSettings->mSock, INT_MAX );
+         WARN_errno( rc == SOCKET_ERROR, "listen" );
+     }
+ 
diff -Nru iperf-2.0.10+dfsg1/debian/patches/series iperf-2.0.10+dfsg1/debian/patches/series
--- iperf-2.0.10+dfsg1/debian/patches/series	2018-06-05 16:48:25.000000000 +0000
+++ iperf-2.0.10+dfsg1/debian/patches/series	2019-06-17 19:16:22.000000000 +0000
@@ -6,3 +6,5 @@
 016-configure-fix-unsetting--g
 017-fix-32b-constat.patch
 018-fix-for-iperf2-long-time-run-on-40Gb-s-NIC-crashes-f.patch
+backlog_increase.patch
+signal_bug.patch
diff -Nru iperf-2.0.10+dfsg1/debian/patches/signal_bug.patch iperf-2.0.10+dfsg1/debian/patches/signal_bug.patch
--- iperf-2.0.10+dfsg1/debian/patches/signal_bug.patch	1970-01-01 00:00:00.000000000 +0000
+++ iperf-2.0.10+dfsg1/debian/patches/signal_bug.patch	2019-06-17 19:16:22.000000000 +0000
@@ -0,0 +1,50 @@
+From: Robert McMahon <rjmcmahon@rjmcmahon.com>
+Subject: [PATCH] fix latent bug in signal handling, per POSIX calling exit()
+ in signal handler is not safe.  Use _exit() instead.  Also, detect the user
+ signal SIGINT for the case of server needing two invocations to stop server
+ threads.  Note: the server threads still need some work from graceful
+ termination with a single ctrl-c
+Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=930390
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1832401
+Last-Update: 2019-06-11
+Applied-Upstream: https://sourceforge.net/p/iperf2/code/ci/7c0ac64ebea38d0d9ff4d160db4d33bc087a3490/
+
+diff --git a/compat/signal.c b/compat/signal.c
+index 92ddc25..48a0f9d 100644
+--- a/compat/signal.c
++++ b/compat/signal.c
+@@ -171,7 +171,7 @@ void sig_exit( int inSigno ) {
+     static int num = 0;
+     if ( num++ == 0 ) {
+         fflush( 0 );
+-        exit( 0 );
++	_exit(0);
+     }
+ } /* end sig_exit */
+ 
+diff --git a/src/main.cpp b/src/main.cpp
+index 53069fd..2a70e8e 100644
+--- a/src/main.cpp
++++ b/src/main.cpp
+@@ -268,7 +268,7 @@ void Sig_Interupt( int inSigno ) {
+     // We try to not allow a single interrupt handled by multiple threads
+     // to completely kill the app so we save off the first thread ID
+     // then that is the only thread that can supply the next interrupt
+-    if ( thread_equalid( sThread, thread_zeroid() ) ) {
++    if ( (inSigno == SIGINT) && thread_equalid( sThread, thread_zeroid() ) ) {
+         sThread = thread_getid();
+     } else if ( thread_equalid( sThread, thread_getid() ) ) {
+         sig_exit( inSigno );
+@@ -420,9 +420,3 @@ VOID ServiceStop() {
+ }
+ 
+ #endif
+-
+-
+-
+-
+-
+-
+-- 
+2.20.1
+