bw/nfs close ports no longer needed for nfs4

nodes/sophie/vmhost.py

@@ -13,6 +13,11 @@ nodes['sophie.vmhost'] = {
         'debian-bookworm',
     },
     'metadata': {
+        'apt': {
+            'packages': {
+                'irqbalance': {},
+            },
+        },
         'groups': {
             'nas': {},
         },
@@ -54,6 +59,7 @@ nodes['sophie.vmhost'] = {
             },
         },
         'nfs-server': {
+            'version': 4,
             'shares': {
                 '/srv/nas': {
                     '172.19.164.0/24': 'ro,all_squash,anonuid=65534,anongid=65534,no_subtree_check',