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Thanks

Hello,

we also had the problem of receiving an 404 HTTP Error with the body message 'fault filter abort' whenever a client connects to the gatway with a port inside the 'Host' Header.

For everyone looking for a workaround, try it this way: For every domain, create one HTTPRoute with two matchers for the HTTP Header "Host". One matching "Host" to "domain:port" and one matching "Host" to "domain" without the port.

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: my-workaround-https-route
spec:
#  hostnames:
#    - "mydomain.com"
  parentRefs:
    - kind: Gateway
      name: my-gateway
      sectionName: https-listener
  rules:
    # This host header matchers are the workaround 
    # Open issue at google (https://issuetracker.google.com/issues/294510336)
    - matches:
        # Matches domain with port
        - headers:
            - name: "Host"
              value: "mydomain.com:443"
          path:
            value: /
            type: PathPrefix
        # Matches domain only
        - headers:
            - name: "Host"
              value: "mydomain.com"
          path:
            value: /
            type: PathPrefix
      # This is not important for the workaround but maybe also useful for people switching from ingress to gateway
      filters:
        - type: RequestHeaderModifier
          requestHeaderModifier:
            set:
              - name: X-Forwarded-Host
                value: "{tls_sni_hostname}"
      backendRefs:
        - name: my-backend-service
          port: 8080

The downside is that you have to create matchers instead of just simply listing all the domains you want to route through this rule. If you use multiple HTTPRoute resources for the same domains, make sure that the rules do not overwrite each other.

I hope the issue gets resolved quickly, we can't implement it on all domains and can't migrate all load balancers to gateway api.

Experiencing the same issue after upgrading gateway class from gke-l7-gxlb to gke-l7-global-external-managed.