diff --git a/configs/danforth/danforth-mdf-4507.cfg b/configs/danforth/danforth-mdf-4507.cfg
index f199045..bf1206d 100644
--- a/configs/danforth/danforth-mdf-4507.cfg
+++ b/configs/danforth/danforth-mdf-4507.cfg
@@ -1,9 +1,9 @@
 Building configuration...
 
-Current configuration : 32324 bytes
+Current configuration : 33238 bytes
 !
-! Last configuration change at 13:52:57 EST Mon Dec 22 2025 by estein66.admin
-! NVRAM config last updated at 21:12:13 EDT Mon Aug 18 2025 by jkafta72.admin
+! Last configuration change at 09:08:49 EDT Thu Mar 12 2026 by estein66.admin
+! NVRAM config last updated at 09:08:51 EDT Thu Mar 12 2026 by estein66.admin
 !
 version 15.2
 no service pad
@@ -122,6 +122,20 @@ archive
  path bootflash:
  maximum 5
 file privilege 10
+object-group network day-enterprise-servers 
+ description day-enterprise-servers
+ host 10.1.230.11
+ host 10.1.40.108
+!
+object-group network dns-servers 
+ description Internal-DNS-Servers
+ host 10.1.40.10
+ host 10.1.48.11
+!
+object-group network ntp-servers 
+ host 10.1.40.154
+ host 10.1.48.103
+!
 !
 spanning-tree mode rapid-pvst
 spanning-tree loopguard default
@@ -187,6 +201,9 @@ vlan 72
 vlan 150
  name Voip
 !
+vlan 230
+ name HVAC
+!
 vlan 502
  name CC-Ring
 !
@@ -1061,6 +1078,11 @@ interface Vlan150
  no ip redirects
  ip pim sparse-mode
 !
+interface Vlan230
+ ip address 10.21.230.1 255.255.255.224
+ ip access-group hvac in
+ shutdown
+!
 interface Vlan502
  description to Ring #2 CCF Service #S200275
  ip address 10.250.202.21 255.255.255.0
@@ -1161,6 +1183,16 @@ ip access-list extended AutoQos-4.0-ACL-Transactional-Data
  permit udp any any eq 1575
  permit tcp any any eq 1630
  permit udp any any eq 1630
+ip access-list extended hvac
+ permit ip 10.21.230.0 0.0.0.31 object-group day-enterprise-servers
+ permit udp 10.21.230.0 0.0.0.31 object-group dns-servers eq domain
+ permit udp 10.21.230.0 0.0.0.31 object-group ntp-servers eq ntp
+ permit icmp 10.21.230.0 0.0.0.31 host 10.21.230.1
+ permit icmp host 10.21.230.1 10.21.230.0 0.0.0.31
+ deny   ip any 10.0.0.0 0.255.255.255
+ deny   ip any 192.168.0.0 0.0.255.255
+ deny   ip any 172.16.0.0 0.15.255.255
+ permit tcp 10.21.230.0 0.0.0.31 any eq 587 log-input
 ip access-list extended users
  deny   ip any 192.168.0.0 0.0.255.255
  permit ip any any