Collaborate Disseminate
Using a “default” configuration, OpenVPN clients show the following warning when connecting to a VPN server in red, attention-seeking letters:
WARNING: this configuration may cache passwords in memory — use the auth-noca… Continue reading What’s the drawback of enabling auth-nocache in OpenVPN?
Yesterday, some spammer on the other side of the world decided to send out a ton of phishing mails with my business mail address as both From address and envelope sender.
The usual best practices are in place: My provider (a… Continue reading Is it possible to defend against a backscatter attack?
This has been going on for about 1-2 days now:
heinzi@guybrush:~$ less /var/log/mail.log | grep ‘^Nov 27 .* postfix/submission.* warning’
[…]
Nov 27 03:36:16 guybrush postfix/submission/smtpd[7523]: warning: hostname bd676a3d.virtua.com… Continue reading Someone is trying to brute-force(?) my private mail server… very… slowly… and with changing IPs
According to media reports, an attacker can
upload a library to a Samba share and then
open a named pipe whose name equals the local path to the uploaded library
to remotely execute the code contained in the library.
How… Continue reading How does the CVE-2017-7494 "SambaCry" exploit work?