diff --git a/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua b/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
index a40979a05..e24773638 100644
--- a/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
+++ b/luci-app-openmptcprouter/luasrc/controller/openmptcprouter.lua
@@ -763,10 +763,11 @@ function settings_add()
 	luci.sys.exec("sysctl -w net.ipv4.tcp_retries2=%s" % tcp_retries2)
 	luci.sys.exec("sed -i 's:^net.ipv4.tcp_retries2=[0-9]*:net.ipv4.tcp_retries2=%s:' /etc/sysctl.d/zzz_openmptcprouter.conf" % tcp_retries2)
 
-	--local tcp_retries2 = luci.http.formvalue("tcp_retries2")
-	--luci.sys.exec("sysctl -w net.ipv4.tcp_retries2=%s" % tcp_retries2)
-	--luci.sys.exec("sed -i 's:^net.ipv4.tcp_retries2=[0-9]*:net.ipv4.tcp_retries2=%s:' /etc/sysctl.d/zzz_openmptcprouter.conf" % tcp_retries2)
-	
+	-- Set ip_default_ttl
+	local ip_default_ttl = luci.http.formvalue("ip_default_ttl")
+	luci.sys.exec("sysctl -w net.ipv4.ip_default_ttl=%s" % ip_default_ttl)
+	luci.sys.exec("sed -i 's:^net.ipv4.ip_default_ttl=[0-9]*:net.ipv4.ip_default_ttl=%s:' /etc/sysctl.d/zzz_openmptcprouter.conf" % ip_default_ttl)
+
 	-- Set tcp_fastopen
 	local tcp_fastopen = luci.http.formvalue("tcp_fastopen")
 	local disablefastopen = luci.http.formvalue("disablefastopen") or "0"
diff --git a/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm b/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm
index 671eee85c..e2c9801f4 100644
--- a/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm
+++ b/luci-app-openmptcprouter/luasrc/view/openmptcprouter/settings.htm
@@ -170,6 +170,12 @@
 		    <input type="text" name="tcp_fastopen" class="cbi-input-text" value="<%=tonumber((luci.sys.exec("sysctl net.ipv4.tcp_fastopen")):match(" %d+"))%>">
 		</div>
 	    </div>
+	    <div class="cbi-value">
+	        <label class="cbi-value-title"><%:IPv4 IP default TTL%></label>
+	        <div class="cbi-value-field">
+		    <input type="text" name="ip_default_ttl" class="cbi-input-text" value="<%=tonumber((luci.sys.exec("sysctl net.ipv4.ip_default_ttl")):match(" %d+"))%>">
+		</div>
+	    </div>
 	    <div class="cbi-value">
 		<label class="cbi-value-title"><%:Enable IPv6%></label>
 		<div class="cbi-value-field">
diff --git a/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter b/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
index 7a4176ed6..46fc817b7 100755
--- a/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
+++ b/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
@@ -83,8 +83,8 @@ start_service() {
 		}
 	}
 	# remove sysctl already defined in /etc/sysctl.d/
-	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' -e '/tcp_syn_retries/d' -e '/tcp_fastopen/d' -e '/tcp_retries2/d' -e '/tcp_retries1/d' /etc/sysctl.conf
-	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' -e '/tcp_syn_retries/d' -e '/tcp_fastopen/d' -e '/tcp_retries2/d' -e '/tcp_retries1/d' /etc/sysctl.d/10-default.conf
+	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' -e '/tcp_syn_retries/d' -e '/tcp_fastopen/d' -e '/tcp_retries2/d' -e '/tcp_retries1/d' -e '/ip_default_ttl/d' /etc/sysctl.conf
+	sed -i -e '/tcp_fin_timeout/d' -e '/tcp_keepalive_time/d' -e '/nf_conntrack_max/d' -e '/tcp_syn_retries/d' -e '/tcp_fastopen/d' -e '/tcp_retries2/d' -e '/tcp_retries1/d' -e '/ip_default_ttl/d' /etc/sysctl.d/10-default.conf
 }
 
 reload_service() {
diff --git a/luci-app-openmptcprouter/root/etc/sysctl.d/zzz_openmptcprouter.conf b/luci-app-openmptcprouter/root/etc/sysctl.d/zzz_openmptcprouter.conf
index 283ce64c5..d759def1b 100644
--- a/luci-app-openmptcprouter/root/etc/sysctl.d/zzz_openmptcprouter.conf
+++ b/luci-app-openmptcprouter/root/etc/sysctl.d/zzz_openmptcprouter.conf
@@ -6,3 +6,4 @@ net.ipv4.tcp_retries1=3
 net.ipv4.tcp_retries2=15
 net.ipv4.tcp_fastopen=3
 net.ipv4.tcp_low_latency=1
+net.ipv4.ip_default_ttl=64