This article confirms that the files /etc/sysconfig/proxy and /etc/sysconfig/netdumper are legitimate configuration files used in the vCenter Server Appliance and explains their purpose.
VMware vCenter Server
The files /etc/sysconfig/proxy and /etc/sysconfig/netdumper are legitimate system files created on the vCenter Server Appliance.
/etc/sysconfig/proxy is the proxy configuration file in the vCenter Server Appliance/etc/sysconfig/netdumper is the configuration file on the vCenter Server Appliance for ESXi dump collectorFor more information, refer to the KB articles below.
How to configure proxy settings for vCenter Server
Configuring the Network Dump Collector service in vSphere