Collaborate Disseminate
So I am supposed to create a UDP server that is supposed to verify the checksums of packets being sent, and then log failures.
The packets have the structure of:
4 bytes – Packet ID
4 bytes – Packet Sequence # (Total Chec… Continue reading Verify Checksum of a UDP Packet [closed]
We often hear TLS over TCP socket and very famliar with its use case e.g. HTTPS.
While I am learning Linux socket progamming, I read a An Introduction to OpenSSL Programming, Part I of II tutorial . (Obviously it’s about TLS … Continue reading Is UDP used for applications that require less security?
I want to obtain reassembled stream payload for both TCP and UDP in Suricata. How can i obtain stream data by manipulating the source code? Which methods/classes in the source can provide me the stream data?
I installed bina… Continue reading Suricata TCP/UDP reassembled stream
Some hacks are born of genius or necessity, and others from our sheer ham-fisted incompetence. This is not a story about the first kind. But it did give me an excuse to show how easy it is to design WiFi-connected devices that work the way you want them to, rather …read more
Continue reading Fried Desk Lamp Reborn: How to Use ESP8266 to Build Connected Devices
I was researching the GitHub DDoS attack of 2018, in which memcached UDP amplification was used. I noticed that a GitHub blog post referenced a CloudFlare post which described memcached-based UDP amplification attacks in gene… Continue reading UDP amplification: length(response_packet) < length(request_packet)
I am running an instance on Google Cloud behind a Network LoadBalancer. When I ran a Qualys scan, which determines what vulnerabilities the system has, I am getting this one. I am surprised as this one is specifically from Li… Continue reading Linux : UDP Constant IP Identification Field Fingerprinting Vulnerability for Linux 4.2 [on hold]
I have an algorithm for detecting worms. for testing this algorithm i need normal traffic and worm traffic. i use simulation for testing. i can simulate traffic generated by clients and i can not simulate traffic of servers e… Continue reading Is there any UDP based worm that propagates between clients? [on hold]
I am facing an issue where DTLS handshake packets are greater than 1500 bytes and I do fragment to make sure it is less than 1500 bytes. The fragmentation is as per RFC dictated. Now, when I check captured pcap, fragment and … Continue reading Does openssl DTLS 1.0.2k takes fragmented input and reassemble fragmented packets?
It can be difficult to resist the impulse buy. You see something interesting, the price is right, and even though you know you should do your research first, you end up putting it in your cart anyway. That’s how [Tobias Girstmair] ended up being the not-so proud owner of a …read more
Continue reading ESP8266 Upgrade Gives IKEA LEDs UDP Superpowers
I’m using Ubuntu 16 with UFW and OpenVPN.
Playing around with Wireshark and noticed some incoming ICMP packets:
The 10.9.101.4 address is my default gateway (VPN). The 10.42.0.201 is an internal network. I’m not sure how … Continue reading Suspicious/strange incoming packets?