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2 changes: 1 addition & 1 deletion modules/configuring-firewall.adoc
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Expand Up @@ -61,7 +61,7 @@ If your environment has a dedicated load balancer in front of your {product-titl
1. In a firewall environment, ensure that the `access.redhat.com` resource is on the allowlist. This resource hosts a signature store that a container client requires for verifying images when pulling them from `registry.access.redhat.com`.
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You can use the wildcards `\*.quay.io` and `*.openshiftapps.com` instead of `cdn0[1-3].quay.io` in your allowlist. When you add a site, such as `quay.io`, to your allowlist, do not add a wildcard entry, such as `*.quay.io`, to your denylist. In most cases, image registries use a content delivery network (CDN) to serve images. If a firewall blocks access, image downloads are denied when the initial download request redirects to a hostname such as `cdn01.quay.io`.
You can use the wildcards `\*.quay.io` and `*.openshiftapps.com` instead of `cdn.quay.io` and `cdn0[1-3].quay.io` in your allowlist. When you add a site, such as `quay.io`, to your allowlist, do not add a wildcard entry, such as `*.quay.io`, to your denylist. In most cases, image registries use a content delivery network (CDN) to serve images. If a firewall blocks access, image downloads are denied when the initial download request redirects to a hostname such as `cdn01.quay.io`.

. Allowlist any site that provides resources for a language or framework that your builds require.

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