ClamAV database update not possible behind proxy server

[yqjrnnxq]

Hi.  Cannot enable ClamAV in squid package due to the fact that the pfsense box itself needs to use an upstream proxy to get Internet access.  The pfsense box is doing this fine for all internal requirements live firmware updating etc, but ClamAV isn't taking any notice of the fact that the pfsense box needs to use an upstream and is attempting direct connections to the ClamAV database update servers and is obviously getting blocked.  Does anyone know how to tell ClamAV to use a proxy for its database updates?