The Suricata IDS is an extremely nice piece of software with multiple deployment scenarios, including inline and with mirroring or taps. The process itself usually runs without any problems, but as with any setup with multiple moving parts there are things that can go wrong. Monitoring and making sure the Suricata processes itself is easy […]
I’ve recently revamped my home network security monitoring. Currently I’m capturing and streaming all network traffic on my MikroTik router’s outside interface to a remote sensor, namely a Raspberry Pi 4 with 4 GB RAM running Suricata IDS. Suricata’s log is read by Elastic’s Filebeat and shipped to an Elasticsearch instance, making the data available […]
I’ve recently revamped my home network security monitoring. Currently I’m capturing and streaming all network traffic on my MikroTik router’s outside interface to a remote sensor, namely a Raspberry Pi 4 with 4 GB RAM running Suricata IDS. Suricata’s log is read by Elastic’s Filebeat and shipped to an Elasticsearch instance, making the data available […]
I’ve recently revamped my home network security monitoring. Currently I’m capturing and streaming all network traffic on my MikroTik router’s outside interface to a remote sensor, namely a Raspberry Pi 4 with 4 GB RAM running Suricata IDS. Suricata’s log is read by Elastic’s Filebeat and shipped to an Elasticsearch instance, making the data available […]
Working from home encourages home office optimization. During the COVID-19 period, with way more video conferences than usual, certain improvements were found necessary. I guess everyone that’s been in a video meeting where more than one participant used a regular mic and regular speakers has experienced the wonders of audio feedback. That prompted me to […]
As always, scammers and phishers use newsworthy events to their advantage. The coronavirus pandemic is no exception. All over the worlds, security researchers observe phishing and scam attempts. Samples for studying and for awareness training are collected at various sites, including https://coronavirusphishing.com/. A large number of security researchers have joined forces to establish a cyber […]
One of my honeypots runs INetSim which, among many other services, emulates an SMTP server. The honeypot is frequently used by spammers who think they’ve found a mail server with easily guessed usernames and passwords. Obviously I’m logging the intruders’ activities, so I’m shipping the logs to Elasticsearch using Filebeat. Shipping the regular INetSim activity […]
A customer of my employer Redpill Linpro was recently the target of a DDoS attack. While investigating the attack, we found a large number of HTTP requests with the User-Agent named CITRIXRECEIVER. The clients performed GET requests to multiple URLs on the customer’s web site at the rate of several thousand packets per second. The […]
The other day while reviewing my fireplot graphs, I noticed (yet) another portscan. They’re not unusual. This one took around four and a half hour to complete, and covered a lot of TCP ports on one IPv4 address. That’s not unusual either. The curved graph shown below is caused by the plot’s logarithmic Y axis, […]
One of my Cowrie honeypots has been configured to intercept various outbound connections, redirecting them into an INetSim honeypot offering corresponding services. When intruders think they’re making an outbound HTTPS connection, they only reach the INetSim server, where their attempts are registered and logged. When someone successfully logs in to the Cowrie honeypot, be it […]