Hi @johnlzy0408, the first test is using telnet from UF: telenet ip_indexer 9997 If you cannot connect on Indexer on port 9997 you could have the following issues: you didn't enabled receiving on Indexer, but, you said that you're receiving from other UFs, so this issue should be excluded; there's a local firewall on Indexer, , but, you said that you're receiving from other UFs, so this issue should be excluded; there's a Firewall between UF and Indexer; there's a local Firewall on UF, outputs.conf on UF isn't correct. I can help you to check only the last issue: could you share your outputs.conf? try to use the outputs.conf of another UF that's running. Ciao. Giuseppe
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