Vault is no longer able to connect to Vault server running on private network with VPN

[tglawless]

Please note we will close your issue without comment if you delete, do not read or do not fill out the issue checklist below and provide ALL the requested information. If you repeatedly fail to use the issue template, we will block you from ever submitting issues to Homebrew again.

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• ran brew update and can still reproduce the problem?
• ran brew doctor, fixed all issues and can still reproduce the problem?
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To help us debug your issue please explain:

• What you were trying to do (and why)
  I'm updating Vault which I use as a client on my Mac to connect to a Vault server over a VPN connection.

• What happened (include command output)
  I upgraded from Vault v0.10.2 to v0.11.4 and Vault is no longer able to resolve the IP address using the DNS servers provided by my VPN connection.

brew install vault --with-dynamic
Warning: vault: this formula has no --with-dynamic option so it will be ignored!
==> Downloading https://homebrew.bintray.com/bottles/vault-0.11.4.high_sierra.bottle.tar.gz
Already downloaded: /Users/<USER_NAME>/Library/Caches/Homebrew/downloads/4680f47e4251390885a1a98bc508e9b988cdae247232b146518724b4991a11ba--vault-0.11.4.high_sierra.bottle.tar.gz
==> Pouring vault-0.11.4.high_sierra.bottle.tar.gz
🍺  /usr/local/Cellar/vault/0.11.4: 6 files, 91.0MB

• What you expected to happen
  Vault v0.11.4 should support the --with-dynamic option as v0.10.2 did allowing me to install vault with cgo enabled.

• Step-by-step reproduction instructions (by running brew install commands)

1. brew install vault --with-dynamic
2. See wanring Warning: vault: this formula has no --with-dynamic option so it will be ignored!
3. When connecting to Vault server over VPN, Vault displays error: Error authenticating: Put https://<HOSTNAME>/v1/auth/github/w3-rre/login: dial tcp: lookup <HOSTNAME> on 192.168.1.1:53: no such host

[fxcoudert]

How is installing without ago linked to your authentification error?

[tglawless]

The error isn't an authentication error. It's a DNS lookup error. For reference see this issue: #7238

[fxcoudert]

• We are trying to cut down the number of options used in Homebrew
• --with-dynamic was rarely used (0.91% of installs)
• Upstream ships static versions.
• It really sounds more like a bug with go, that should be fixed there.

For these reasons, I am going to close this, as we are not going to revert.