diff --git a/cmd/main.go b/cmd/main.go
index 8760cbd..4d488d1 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"golang.org/x/exp/slog"
+	"nfsense.net/nfsense/pkg/definitions"
 	"nfsense.net/nfsense/pkg/jsonrpc"
 	"nfsense.net/nfsense/pkg/server"
 )
@@ -27,6 +28,14 @@ func main() {
 
 	slog.Info("Config Loaded", "config", conf)
 
+	err = definitions.ValidateConfig(conf)
+	if err != nil {
+		slog.Error("Validating Config", err)
+		os.Exit(1)
+	}
+
+	slog.Info("Validating Config")
+
 	if *applyPtr {
 		slog.Info("Applying Config...")
 		err := apply(conf)
diff --git a/go.mod b/go.mod
index f25b83d..ba80e2c 100644
--- a/go.mod
+++ b/go.mod
@@ -9,4 +9,13 @@ require (
 	nhooyr.io/websocket v1.8.7
 )
 
-require github.com/klauspost/compress v1.10.3 // indirect
+require (
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.11.2 // indirect
+	github.com/klauspost/compress v1.10.3 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/sys v0.4.0 // indirect
+	golang.org/x/text v0.6.0 // indirect
+)
diff --git a/go.sum b/go.sum
index d9ac8a3..3dda176 100644
--- a/go.sum
+++ b/go.sum
@@ -7,10 +7,16 @@ github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwv
 github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
 github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q=
 github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
 github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
 github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
 github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1Vv0sFl1UcHBOY=
 github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
+github.com/go-playground/validator/v10 v10.11.2 h1:q3SHpufmypg+erIExEKUmsgmhDTyhcJ38oeKGACXohU=
+github.com/go-playground/validator/v10 v10.11.2/go.mod h1:NieE624vt4SCTJtD87arVLvdmjPAeV8BQlHtMnw9D7s=
 github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee h1:s+21KNqlpePfkah2I+gwHF8xmJWRjooY+5248k6m4A0=
 github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
 github.com/gobwas/pool v0.2.0 h1:QEmUOlnSjWtnpRGHF3SauEiOsy82Cup83Vf2LcMlnc8=
@@ -33,6 +39,8 @@ github.com/klauspost/compress v1.10.3 h1:OP96hzwJVBIHYU52pVTI6CczrxPvrGfgqF9N5eT
 github.com/klauspost/compress v1.10.3/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
 github.com/leodido/go-urn v1.2.0 h1:hpXL4XnriNwQ/ABnpepYM/1vCLWNDfUNts8dX3xTG6Y=
 github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII=
+github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
+github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 h1:ZqeYNhU3OHLH3mGKHDcjJRFFRrJa6eAM5H+CtDdOsPc=
@@ -43,17 +51,24 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
 github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs=
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 go4.org/netipx v0.0.0-20230125063823-8449b0a6169f h1:ketMxHg+vWm3yccyYiq+uK8D3fRmna2Fcj+awpQp84s=
 go4.org/netipx v0.0.0-20230125063823-8449b0a6169f/go.mod h1:tgPU4N2u9RByaTN3NC2p9xOzyFpte4jYwsIIRF7XlSc=
+golang.org/x/crypto v0.5.0 h1:U/0M97KRkSFvyD/3FSmdP5W5swImpNgle/EHFhOsQPE=
+golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU=
 golang.org/x/exp v0.0.0-20230224173230-c95f2b4c22f2 h1:Jvc7gsqn21cJHCmAWx0LiimpP18LZmUxkT5Mp7EZ1mI=
 golang.org/x/exp v0.0.0-20230224173230-c95f2b4c22f2/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
+golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=
+golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.6.0 h1:3XmdazWV+ubf7QgHSTWeykHOci5oeekaGJBLkrkaw4k=
+golang.org/x/text v0.6.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -61,5 +76,6 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 nhooyr.io/websocket v1.8.7 h1:usjR2uOr/zjjkVMy0lW+PPohFok7PCow5sDjLgX4P4g=
 nhooyr.io/websocket v1.8.7/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0=
diff --git a/pkg/definitions/address.go b/pkg/definitions/address.go
index d5be589..9394a2f 100644
--- a/pkg/definitions/address.go
+++ b/pkg/definitions/address.go
@@ -8,11 +8,11 @@ import (
 )
 
 type Address struct {
-	Type     AddressType     `json:"type"`
+	Type     AddressType     `json:"type" validate:"min=0,max=3"`
 	Comment  string          `json:"comment,omitempty"`
-	Host     *netip.Addr     `json:"host,omitempty"`
-	Range    *netipx.IPRange `json:"range,omitempty"`
-	Network  *IPNet          `json:"network,omitempty"`
+	Host     *netip.Addr     `json:"host,omitempty" validate:"excluded_unless=Type 0"`
+	Range    *netipx.IPRange `json:"range,omitempty" validate:"excluded_unless=Type 1"`
+	Network  *IPNet          `json:"network,omitempty" validate:"excluded_unless=Type 2"`
 	Children *[]string       `json:"children,omitempty"`
 }
 
diff --git a/pkg/definitions/config.go b/pkg/definitions/config.go
index 8674a65..f1faa7a 100644
--- a/pkg/definitions/config.go
+++ b/pkg/definitions/config.go
@@ -1,6 +1,37 @@
 package definitions
 
+import (
+	"fmt"
+
+	"github.com/go-playground/validator/v10"
+	"golang.org/x/exp/slog"
+)
+
 type Config struct {
-	ConfigVersion uint64   `json:"config_version"`
-	Firewall      Firewall `json:"firewall"`
+	ConfigVersion uint64   `json:"config_version" validate:"required,eq=1"`
+	Firewall      Firewall `json:"firewall" validate:"required,dive"`
+}
+
+func ValidateConfig(conf *Config) error {
+	val := validator.New()
+	slog.Info("Registering validator")
+	val.RegisterValidation("test", nilIfOtherNil)
+	return val.Struct(conf)
+}
+
+func nilIfOtherNil(fl validator.FieldLevel) bool {
+	slog.Info("Start", "field", fl.FieldName(), "param", fl.Param())
+	if !fl.Field().IsNil() {
+		slog.Info("Field is not nil", "field", fl.FieldName())
+		f := fl.Parent().FieldByName(fl.Param())
+		if f.IsZero() {
+			panic(fmt.Errorf("Param %v is not a Valid Field", fl.Param()))
+		}
+		if !f.IsNil() {
+			slog.Info("Fail", "field", fl.FieldName(), "param", fl.Param())
+			return false
+		}
+	}
+	slog.Info("Success", "field", fl.FieldName(), "param", fl.Param())
+	return true
 }
diff --git a/pkg/definitions/firewall.go b/pkg/definitions/firewall.go
index d1bfcca..c5c695d 100644
--- a/pkg/definitions/firewall.go
+++ b/pkg/definitions/firewall.go
@@ -1,9 +1,9 @@
 package definitions
 
 type Firewall struct {
-	ForwardRules        []ForwardRule        `json:"forward_rules"`
-	DestinationNATRules []DestinationNATRule `json:"destination_nat_rules"`
-	SourceNATRules      []SourceNATRule      `json:"source_nat_rules"`
-	Addresses           map[string]Address   `json:"addresses"`
-	Services            map[string]Service   `json:"services"`
+	ForwardRules        []ForwardRule        `json:"forward_rules" validate:"required,dive"`
+	DestinationNATRules []DestinationNATRule `json:"destination_nat_rules" validate:"required,dive"`
+	SourceNATRules      []SourceNATRule      `json:"source_nat_rules" validate:"required,dive"`
+	Addresses           map[string]Address   `json:"addresses" validate:"required,dive"`
+	Services            map[string]Service   `json:"services" validate:"required,dive"`
 }
diff --git a/pkg/definitions/rule.go b/pkg/definitions/rule.go
index 65ae33a..18e07e4 100644
--- a/pkg/definitions/rule.go
+++ b/pkg/definitions/rule.go
@@ -3,15 +3,15 @@ package definitions
 import "encoding/json"
 
 type Rule struct {
-	Name    string `json:"name"`
-	Match   Match  `json:"match"`
+	Name    string `json:"name" validate:"required"`
+	Match   Match  `json:"match" validate:"required,dive"`
 	Comment string `json:"comment,omitempty"`
 	Counter bool   `json:"counter,omitempty"`
 }
 
 type ForwardRule struct {
 	Rule
-	Verdict Verdict `json:"verdict"`
+	Verdict Verdict `json:"verdict" validate:"min=0,max=2"`
 }
 
 type Verdict int
diff --git a/pkg/definitions/service.go b/pkg/definitions/service.go
index bf8f1d5..7a0ede0 100644
--- a/pkg/definitions/service.go
+++ b/pkg/definitions/service.go
@@ -6,13 +6,13 @@ import (
 )
 
 type Service struct {
-	Type       ServiceType `json:"type"`
+	Type       ServiceType `json:"type" validate:"min=0,max=3"`
 	Comment    string      `json:"comment,omitempty"`
-	SPortStart *uint32     `json:"sport_start,omitempty"`
+	SPortStart *uint32     `json:"sport_start,omitempty" validate:"excluded_unless=Type 0|excluded_unless=Type 1"`
 	SPortEnd   *uint32     `json:"sport_end,omitempty"`
-	DPortStart *uint32     `json:"dport_start,omitempty"`
+	DPortStart *uint32     `json:"dport_start,omitempty" validate:"excluded_unless=Type 0|excluded_unless=Type 1"`
 	DPortEnd   *uint32     `json:"dport_end,omitempty"`
-	ICMPCode   *uint32     `json:"icmp_code,omitempty"`
+	ICMPCode   *uint32     `json:"icmp_code,omitempty" validate:"excluded_unless=Type 2"`
 	Children   *[]string   `json:"children,omitempty"`
 }
 
diff --git a/pkg/definitions/source_nat.go b/pkg/definitions/source_nat.go
index 5678b29..ce1ad61 100644
--- a/pkg/definitions/source_nat.go
+++ b/pkg/definitions/source_nat.go
@@ -4,7 +4,7 @@ import "encoding/json"
 
 type SourceNATRule struct {
 	Rule
-	Type    SnatType `json:"type"`
+	Type    SnatType `json:"type" validate:"min=0,max=1"`
 	Address string   `json:"address,omitempty"`
 	Service string   `json:"service,omitempty"`
 }