【図解】TCP Keep-Alive/http Keep-Aliveの仕組みと違い ～Client/Serverの挙動とメリット,設定～KeepAlive とは一般に、ある 2 つの機器間の通信接続において、相手が活きているかを確認し、その接続を維持する仕組みを KeepAlive と呼びます。KeepAlive は TCP や http, IPsec, BGP 等、様々な TCP Keep-Alive: 在OS層級上設定 HTTP Keep-Alive: 在Server上設定. 如Apache或nginx 重點在於分析封包時, 可用下面的filter把TCP Keep-Alive時雙方發送的one garbage byte without data過濾掉(下圖黑色的部分...)!(tcp.analysis.keep_alive || tcp.analysis.keep_alive_ack)...只是如果攻擊者反過來利用這點的話?? Filter out TCP Keep-Alive packets in WiresharkBy default, Wireshark likes to mark TCP keep-alive packets as scary errors; opting to display them in a gruesome black-and-red and scaring anyone trying to analyze TCP dumps in an effort to debug n…

Hackers made it onto one of our production servers 😅. We've isolated it from the internet until we can clean the machine up. The IR team reported eight difference backdoors on the server, but didn't say what they were and we can't get in touch with them. We need to get this server back into prod ASAP - we're losing money every second it's down. Please find the eight backdoors (both remote access and privilege escalation) and remove them. Once...