diff --git a/files/app/main/status/e/network.ut b/files/app/main/status/e/network.ut
index 211e350a..cbc2c875 100755
--- a/files/app/main/status/e/network.ut
+++ b/files/app/main/status/e/network.ut
@@ -186,10 +186,11 @@ if (request.env.REQUEST_METHOD === "DELETE") {
 }
 const dmz_mode = configuration.getSettingAsInt("dmz_mode", 3);
 const dhcp = configuration.getDHCP("nat");
-const ds = split(dhcp.start, ".");
-const de = split(dhcp.end, ".");
-const dhcp_start = int(ds[3]);
-const dhcp_end = int(de[3]) + 256 * (de[2] - ds[2]);
+const db = iptoarr(dhcp.base);
+const ds = iptoarr(dhcp.start);
+const de = iptoarr(dhcp.end);
+const dhcp_start = (ds[2] - db[2]) * 256 + (ds[3] - db[3]);
+const dhcp_end = (de[2] - db[2]) * 256 + (de[3] - db[3]);
 const wan_proto = configuration.getSettingAsString("wan_proto", "disabled");
 const wan_iface = split(configuration.getSettingAsString("wan_intf", ""), ".");
 const wan_vlan = wan_iface[1] ? wan_iface[1] : "";
@@ -495,6 +496,7 @@ const gateway_altnet = dmz_mode === 1 ? dhcp.gateway : "";
                     endp = "[]";
                 }
                 else {
+                    const v = ip.validity.valid;
                     const i = ipv.split(".");
                     const netip = (parseInt(i[3]) + 256 * parseInt(i[2])) & size;
                     if (startv < 1 || endv >= size || (netip >= startv && netip <= endv)) {
@@ -506,14 +508,16 @@ const gateway_altnet = dmz_mode === 1 ? dhcp.gateway : "";
                     if (ipv === base) {
                         ipp = "[]";
                     }
-                    startid.innerHTML = `Start offset from ${base} for allocating DHCP addresses`;
-                    endid.innerHTML = `End offset from ${base} for allocating DHCP addresses`;
+                    startid.innerHTML = `Start offset from ${v ? base : "-"} for allocating DHCP addresses`;
+                    endid.innerHTML = `End offset from ${v ? base : "-"} for allocating DHCP addresses`;
                 }
             }
             netmask.pattern = netmaskp;
             start.pattern = startp;
             end.pattern = endp;
-            ip.pattern = ipp;
+            if (ip.name !== "lan44_dhcp_ip") {
+                ip.pattern = ipp;
+            }
         }
         function validateLANRange()
         {
diff --git a/files/etc/cron.hourly/check-supernodes b/files/etc/cron.hourly/check-supernodes
index add27b05..e7222d9f 100755
--- a/files/etc/cron.hourly/check-supernodes
+++ b/files/etc/cron.hourly/check-supernodes
@@ -71,7 +71,7 @@ if not best.destination then
 end
 
 -- Update the dns and restart network if necessary
-local dns = "#" .. best.destination .. "\nserver=/local.mesh/" .. best.destination .. "\nrev-server=10.0.0.0/8," ..best.destination .. "\nrev-server=172.31.0.0/16," .. best.destination .. "\nrev-server=172.30.0.0/16," .. best.destination .. "\n"
+local dns = "#" .. best.destination .. "\nserver=/local.mesh/" .. best.destination .. "\nrev-server=10.0.0.0/8," ..best.destination .. "\nrev-server=172.31.0.0/16," .. best.destination  .. "\nrev-server=172.30.0.0/16," .. best.destination .. "\nrev-server=44.0.0.0/9," .. best.destination .. "\nrev-server=44.128.0.0/10," .. best.destination .. "\n"
 local odns = ""
 local f = io.open(dns_file)
 if f then
diff --git a/files/usr/local/bin/node-setup b/files/usr/local/bin/node-setup
index 2ee85a97..87d3dbc9 100755
--- a/files/usr/local/bin/node-setup
+++ b/files/usr/local/bin/node-setup
@@ -1152,7 +1152,8 @@ if nixio.fs.access("/etc/config.mesh/olsrd", "r") then
         end
         if is_altnet_mode() then
             local a, b, c, d = cfg.lan_ip:match("(.*)%.(.*)%.(.*)%.(.*)")
-            of:write(string.format("\nconfig Hna4\n\toption netaddr %s.%s.%s.%d\n\toption netmask %s\n\n", a, b, c, d - 1, cfg.lan_mask))
+            local m, n, o, p = cfg.lan_mask:match("(.*)%.(.*)%.(.*)%.(.*)")
+            of:write(string.format("\nconfig Hna4\n\toption netaddr %s.%s.%d.%d\n\toption netmask %s\n\n", a, b, nixio.bit.band(c, o), nixio.bit.band(d, p), cfg.lan_mask))
         end
 
         if cfg.wifi_enable ~= "1" and is_notnull(cfg.wifi_ip) then
diff --git a/files/usr/share/ucode/aredn/configuration.uc b/files/usr/share/ucode/aredn/configuration.uc
index f66771fc..0186285c 100755
--- a/files/usr/share/ucode/aredn/configuration.uc
+++ b/files/usr/share/ucode/aredn/configuration.uc
@@ -206,12 +206,17 @@ export function getDHCP(mode)
     initSetup();
     const setup = scursor.get_all("setup", "globals");
     if (mode === "nat" || (!mode && setup.dmz_mode === "0")) {
-        const root = replace(setup.lan_ip, /\d+$/, "");
+        const i = iptoarr(setup.lan_ip);
+        const m = iptoarr(setup.lan_mask);
+        const b = ((i[2] & m[2]) * 256 + (i[3] & m[3]));
+        const s = b + int(setup.dhcp_start);
+        const e = b + int(setup.dhcp_end);
         return {
             enabled: setup.lan_dhcp !== "0" ? true : false,
             mode: 0,
-            start: `${root}${setup.dhcp_start}`,
-            end: `${root}${setup.dhcp_end}`,
+            base: `${i[0]}.${i[1]}.${(b >> 8) & 255}.${b & 255}`,
+            start: `${i[0]}.${i[1]}.${(s >> 8) & 255}.${s & 255}`,
+            end: `${i[0]}.${i[1]}.${(e >> 8) & 255}.${e & 255}`,
             gateway: setup.lan_ip,
             mask: setup.lan_mask,
             cidr: network.netmaskToCIDR(setup.lan_mask),
@@ -225,12 +230,17 @@ export function getDHCP(mode)
         };
     }
     else if (setup.dmz_mode === "1") {
-        const root = replace(setup.lan_ip, /\d+$/, "");
+        const i = iptoarr(setup.lan_ip);
+        const m = iptoarr(setup.lan_mask);
+        const b = ((i[2] & m[2]) * 256 + (i[3] & m[3]));
+        const s = b + int(setup.dhcp_start);
+        const e = b + int(setup.dhcp_end);
         return {
             enabled: setup.lan_dhcp !== "0" ? true : false,
             mode: 1,
-            start: `${root}${setup.dhcp_start}`,
-            end: `${root}${setup.dhcp_end}`,
+            base: `${i[0]}.${i[1]}.${(b >> 8) & 255}.${b & 255}`,
+            start: `${i[0]}.${i[1]}.${(s >> 8) & 255}.${s & 255}`,
+            end: `${i[0]}.${i[1]}.${(e >> 8) & 255}.${e & 255}`,
             gateway: setup.lan_ip,
             mask: setup.lan_mask,
             cidr: network.netmaskToCIDR(setup.lan_mask),
@@ -244,12 +254,17 @@ export function getDHCP(mode)
         };
     }
     else {
-        const root = replace(setup.dmz_lan_ip, /\d+$/, "");
+        const i = iptoarr(setup.dmz_lan_ip);
+        const m = iptoarr(setup.dmz_lan_mask);
+        const b = ((i[2] & m[2]) * 256 + (i[3] & m[3]));
+        const s = b + int(setup.dmz_dhcp_start);
+        const e = b + int(setup.dmz_dhcp_end);
         return {
             enabled: setup.lan_dhcp !== "0" ? true : false,
             mode: int(setup.dmz_mode),
-            start: `${root}${setup.dmz_dhcp_start}`,
-            end: `${root}${setup.dmz_dhcp_end}`,
+            base: `${i[0]}.${i[1]}.${(b >> 8) & 255}.${b & 255}`,
+            start: `${i[0]}.${i[1]}.${(s >> 8) & 255}.${s & 255}`,
+            end: `${i[0]}.${i[1]}.${(e >> 8) & 255}.${e & 255}`,
             gateway: setup.dmz_lan_ip,
             mask: setup.dmz_lan_mask,
             cidr: network.netmaskToCIDR(setup.dmz_lan_mask),