When cleaning the cache on varnish 3.0 there is a way to only ban the specific host.
The command is:
varnishadm -T localhost:1234 ban req.http.host ~ “site.com” && req.url ~ …
mountd: refused mount request: unmatched host
mountd: refused mount request: unmatched host
Most likely the problem is on /etc/exports, add your IP or range after the directory you want to share.
vim /etc/exports
/opt/smr 172.17.0.0/16(rw,sync,no_root_squash)
Check …