Is it possible to limit BitTorrent Sync connections to a a specific network using the client software? Right now the closest I can come up with would be IP limitations imposed on each client using a firewall. This seems like it would work fine, except for if any client somehow ventures outside those firewall restrictions.
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If you are using Linux, iptables has a match called "owner" where you can apply certain rules based off the UID or GID of the process sending the data.
For instance:
- Put the IP's or CIDR network addresses in a file (one entry per line)
- Create a new user called btsync
Run the following:
#/bin/bash RESTRICTED_IP_FILE="/some/file" sudo iptables -N btsync_filter sudo iptables -I OUTPUT -m owner --uid-owner btsync -j btsync_filter while read ip; do [[ -n "$ip" ]] && sudo iptables -A btsync_filter -d $ip -j DROP done < $RESTRICTED_IP_FILE sudo -u btsync btsync
This will run btsync as the user btsync and all packets from that process that are going to a restricted IP will be dropped.
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