- display correctly the connection status with the daemon whe it's
disconnected.
- display correctly the icon (at least on gnome).
- changed "active" icon to svg, to fix a size problem displaying
notifications on gnome.
On gnome-shell,ubuntu 18.04 by using the Warning icon, it substituted
our icon by another one. So use NoIcon, since we're already setting our
own alert icon.
- Dump connections from kernel querying by source port + protocol.
- Prioritize responses which match the outgoing connection.
- If we don't get any response, apply the default action configured in
/etc/opensnitchd/default-config.json
--
A connection can be considered unique if:
protocol + source port + source ip + destination ip + destination port
We can be quite sure that only one process has created the connection.
However, many times, querying the kernel for the connection details by
all these parameters results in no response.
A regular query and normal response would be:
query: TCP:47344:192.168.1.106 -> 151.101.65.140:443
response: 47344:192.168.1.106 -> 151.101.65.140:443, inode: 1234567, ...
But in another cases, the details of the outgoing connection differs
from the kernel response, or it even doesn't exist.
However, if we query by protocol+source port, we can get more entries, and
somewhat guess what program opened the outgoing connection.
Some examples of querying by outgoing connection and response from
kernel:
query: 8612:192.168.1.5 -> 192.168.1.255:8612
response: 8612:192.168.1.105 -> 0.0.0.0:0
query: 123:192.168.1.5 -> 217.144.138.234:123
response: 123:0.0.0.0 -> 0.0.0.0:0
query: 45015:127.0.0.1 -> 239.255.255.250:1900
response: 45015:127.0.0.1 -> 0.0.0.0:0
query: 50416:fe80::9fc2:ddcf:df22:aa50 -> fe80::1:53
response: 50416:254.128.0.0 -> 254.128.0.0:53
query: 51413:192.168.1.106 -> 103.224.182.250:1337
response: 51413:0.0.0.0 -> 0.0.0.0:0
Added ProcMonitorMethod, which can be "proc", "ftrace" or "audit".
Parameters passed by command line take prevalence over default
configuration.
breaking changes: config options changed from xx_yy to XxYy.
Config example:
{
"DefaultAction": "allow",
"DefaultDuration": "once",
"InterceptUnknown": true,
"ProcMonitorMethod": "audit"
}
It looks like it's part of python since 3.2, and as far as I can tell
without the pip dependency work just fine (tested on ubuntu >=14.x, mint
>= 18, debian >= 8.x).
It should also help packaging for ArchLinux #8.
It looks like it's part of python since 3.2, and as far as I can tell
without the pip dependency work just fine (tested on ubuntu >=14.x, mint
>= 18, debian >= 8.x).
Some people has asked where they can change the daemon configuration.
As we can't change it from the GUI yet, and we're providing deb
packages, we need to distribute a default config.
That way the users will see it and will be able to customize it.
auditd events provides the parent pid of a process which has created
a connection. If we don't find the socket inode under the pid of the
process, use the ppid.
This is normally the case when systemd-* spawns a new process which
creates a new connection.
mozilla/libaudit-go does not support i386/arm/etc, and we were using it
only for parsing audit messages.
So do not use it and parse raw messages directly. WIP.
Use auditd events to keep a list of PIDs which open sockets, reading
them from the audisp af_unix plugin.
- Install auditd and audisp-plugins
- Enable the af_unix plugin (/etc/audisp-plugin/af_unix, active = yes)
- Start opensnitch with -process-monitor-method audit.
If the choosen method is audit but it's not active or not installed,
it'll fallback to /proc anyway.
If it's properly configured, a debug trace will be written to the logs:
"PID found via audit events ..."
