Is admin accessible after restarting it via root?    service adminshell restart

Can we try enabling the proxy settings on the collector?    "conf proxy <ip address> <port> <user> <pass>"  where user and pass are optional. After this reboot and share with me again the output of "service concsotgw restart"   Thanks, Brandon

Can you PM the contents of the file located at /opt/ConcsoTgw/tail-end-gateway-decoupled/conf/csof_config.xml   Also do you require a proxy server for uploads/internet access?

Can you share the appliance ID and version of collector? Has it been upgraded or is it on the same version that it was deployed on?

Can you share the same but without the "-k" flag?