I installed MetalLB using the following manifest:

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.13.12/config/manifests/metallb-native.yaml

My cluster is configured in IPVS mode:

kubectl get configmap kube-proxy -n kube-system -o yaml | 
sed -e "s/strictARP: false/strictARP: true/" | 
kubectl diff -f - -n kube-system

However, when I try to install the following IPAddressPool:

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: address-pool
  namespace: metallb-system 
spec:
  addresses:
  - 192.168.1.1-192.168.1.254

---
apiVersion: metallb.io/v1beta1
kind: L2Advertisement
metadata:
  name: l2advertisement
  namespace: metallb-system
spec:
  ipAddressPools:
  - address-pool

Two webhooks seem to reject my configuration:

kubectl apply -f ipaddresspool.yaml
Error from server (InternalError): error when creating "ipaddresspool.yaml": Internal error occurred: failed calling webhook "l2advertisementvalidationwebhook.metallb.io": failed to call webhook: Post "https://webhook-service.metallb-system.svc:443/validate-metallb-io-v1beta1-l2advertisement?timeout=10s": context deadline exceeded
Error from server (InternalError): error when creating "ipaddresspool.yaml": Internal error occurred: failed calling webhook "ipaddresspoolvalidationwebhook.metallb.io": failed to call webhook: Post "https://webhook-service.metallb-system.svc:443/validate-metallb-io-v1beta1-ipaddresspool?timeout=10s": context deadline exceeded

Can you help me resolve this issue?

I tried the solution proposed in this issue, then the IP AddressPools install correctly, but the external IPs are only accessible internally. I cannot curl my external IP, for example, from my master node.