netcap | A framework for secure and scalable network traffic
kandi X-RAY | netcap Summary
kandi X-RAY | netcap Summary
the netcap (network capture) framework efficiently converts a stream of network packets into platform neutral type-safe structured audit records that represent specific protocols or custom abstractions. these audit records can be stored on disk or exchanged over the network, and are well suited as a data source for machine learning algorithms. since parsing of untrusted input can be dangerous and network data is potentially malicious, a programming language that provides a garbage collected memory safe runtime is used for the implementation. it was developed for a series of experiments in my bachelor thesis: implementation and evaluation of secure and scalable anomaly-based network intrusion detection. slides from my presentation at the leibniz supercomputing centre of the bavarian academy of sciences and humanities are available on researchgate. the project won the 2nd place at kaspersky labs securit cup 2018 in budapest. netcap uses google's protocol buffers to encode its output, which allows accessing it across a wide range of
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QUESTION
My APP use WifiNetworkSpecifier to connect to a router.
And once connect to the router. APP called
connection_manager.BindProcessToNetwork(network);
After called this function. Even I turn off the WiFi. And turn on the mobile data.
The APP will not able to connect to internet anymore.
If this function is not called. APP will be able to connect to internet through mobile data.
What is the mechanism of BindProcessToNetwork()?
...ANSWER
Answered 2020-Nov-20 at 14:33Once BindProcessToNetwork
is called, ALL networking sockets are bound to that network for the lifecycle of that app (this is mainly a security feature so packets will not "leak" another network).
You can clear that network binding by calling BindProcessToNetwork
again, but passing in null
as your network type.
QUESTION
I have a Django app with Docker
I want to initialize my database based on init.sql file when running docker-compose up
2 containers are correctly built and init.sql file is available in db_container
but docker logs db_container
show an error indicating that database has not been migrated yet:
ERROR: relation table1 does not exist
Database is created when entrypoint.sh files is executed (command python manage.py migrate)
I do not understand when init.db is executed?
Dockerfile
...ANSWER
Answered 2020-Sep-30 at 14:49/docker-entrypoint-initdb.d/init.sql
is executed the moment your database container starts running, while your entrypoint.sh
is executed the moment your web container starts running. Since your web container depends on your database container, the SQL script will always be executed ahead of your entrypoint.
In other words, what you want is impossible.
You need to either create the database and table1 in init.sql
and tell Django not to attempt creating them if they already exists or somehow add your INSERT..
to the list of migrations to be run.
I've never used Django, so I do not know if either of the above is possible.
QUESTION
Working on an embedded Linux system (with some limited resources), my current application demands that external device talk to this board via Ethernet TCP/IP, on port 502. By default, ports under 1024 are blocked under *nix environments.
So, lets suppose that external device opens a port on 502, and embedded device listens on 8502. How can I transparently allow a bidirectional communication in between those devices?
Good news is that ROOT access is granted to implement this Port Forwarding solution, which will reside inside the embedded Linux device on continuous run, but haven't found what is the correct command for such.
I have tried using iptables
, with different combinations of the following commands:
ANSWER
Answered 2017-Jul-24 at 21:37In case someone else stumbles on this very issue: unfortunately, my iptables version hasn't support for REDIRECT, which was crucial to make it work.
So the solution was to compile another application for my hardware. And in this case socat
.
The command to make my application work was:
socat TCP-LISTEN:502,fork TCP-CONNECT:127.0.0.1:8502
Hope it can be helpful for future needs.
QUESTION
I've got an app that connects to a wifi access point, then connects to a local server on port 50,000. Works fine on API < 29. But in 29, I have to use ConnectivityManager instead of WifiManager. Got that working no problem. The problem is connecting to the server afterwards. The device acts like port 50,000 is closed, yet I have other devices right here that are connecting without problem. But if I tell the device to connect to the same server on port 80 (which is also open), boom, instant connection. So I am connected to the access point and the server is accessible, I just can't get it to connect to 50,000. Is there some special permission I need to request to access ports >1024 maybe? I tried adding the internet permission to my manifest, but if I add the capability NetCapability.Internet then the callback gets instantly called with OnUnavailable. Doesn't even try. I've also got capabilities NotRestricted and Trusted in there too. Anyone know what I'm missing here?
...ANSWER
Answered 2020-Feb-06 at 23:30After the wifi switch succeeds and OnAvailable gets called, you must call ConnectivityManager.BindProcessToNetwork().
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