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@@ -279,8 +279,11 @@ class ContentRepositoryConfig(Config):
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# synapse to issue arbitrary GET requests to your internal services,
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# causing serious security issues.
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#
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- # This must be specified if url_preview_enabled. It is recommended that you
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- # uncomment the following list as a starting point.
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+ # (0.0.0.0 and :: are always blacklisted, whether or not they are explicitly
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+ # listed here, since they correspond to unroutable addresses.)
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+ #
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+ # This must be specified if url_preview_enabled is set. It is recommended that
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+ # you uncomment the following list as a starting point.
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#
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#url_preview_ip_range_blacklist:
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# - '127.0.0.0/8'
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