We would like to use Istio for achieving blocking of egress access from applications and to have an allow-list/block-list of IP Addresses and CIDR blocks. Are there any solutions possible using Istio?
-Renjith
1
There are 1 best solutions below
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I think you could use REGISTRY_ONLY
outboundTrafficPolicy.modefor that.More about that here and here.
AFAIK the only way to create an allow/block list in istio is with AuthorizationPolicy or EnvoyFilter.
I have found few examples where they used AuthorizationPolicy with egress gateway, for example here.
They just changed the AuthorizationPolicy label from
app: istio-ingressgatewaytoapp: istio-egressgateway.I was looking for any example with ip/cidr, but I couldn't find anything, so I'm not sure if that's gonna work with the egress gateway.
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