YaCy can use another proxy to connect to the internet. You can enter the address for the remote proxy here:

Use remote proxy:			Enables the usage of the remote proxy by yacy
Use remote proxy for yacy <-> yacy communication			Specifies if the remote proxy should be used for the communication of this peer to other yacy peers. Hint: Enabling this option could cause this peer to remain in junior status.
Use remote proxy for https			Specifies if YaCy should forward ssl connections to the remote proxy.
Remote proxy host:			The ip address or domain name of the remote proxy
Remote proxy port:			the port of the remote proxy
Remote proxy user:
Remote proxy pwd:
no-proxy adresses:			IP addresses for which the remote proxy should not be used
Changes will take effect immediately.