Note
The firewall must permit CN Pro to connect to any IP address
on port 2200/tcp, to allow it to ascertain the closest server for online
lookups.
Before the first
successful download of the CSRV occurs, CN Pro will operate in Online Lookup Mode. To do this, CN Pro
must be able to connect to csrv.censornet.com:2200, which runs in three
international locations.
|
|
Note The firewall must permit CN Pro to connect to any IP address
on port 2200/tcp, to allow it to ascertain the closest server for online
lookups. |
Although all of our
mirrors use the HTTPS protocol, meaning that any upstream proxies in the data
path cannot determine the size of the download (the initial download is over 2GB
in size), some ISPs just count the number of packets in a data stream and cut-off
after a set amount of data has been downloaded. This may prevent enough data from
being downloaded to CN Pro for it to have a full CSRV database, in which case, CN
Pro will remain in Online Lookup Mode.
CN Pro ensures that
the download will resume from where it left off if this situation occurs and no
data corruption should occur.
CensorNet can also
offer a service where baseline files can be supplied on DVD via next day
delivery. This is why the dialogue in Figure 8.12 offers an Update Mode field.
The default option
for this field is Download all updates
which attempts to download all updates at the defined time.
The field also
supports Do not update and Incremental updates only.
Do not update never performs an update.
Incremental updates only means that only the daily updates (which are
relatively small and shouldn’t be blocked) will be downloaded over the Internet
connection. Any new baseline files must be requested from CensorNet, via DVD.
See the description
on the URL Database Status in Section 3.
Related Topics