Validating challenges from multiple network [FIREWALLS]

Issuance Policy
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Acctually we block all conecton became from another county with SONICWALL.

So we thi new feature, what we have to do?

For secutity reasons our dedicate local server only accept connection from Brazil.

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Hi @ronancastro, welcome to the community forum.

I recommend that you use the DNS-01 challenge type instead.

Let’s Encrypt explicitly does not recommend source IP firewall policy when using the HTTP-01 or TLS-ALPN-01 challenge types. The source IPs are subject to change without notice and we do not publish a list. You can find many forum threads where this policy has been discussed (e.g. this recent one).

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