I have a setup where I need to boot Arris VIP4302 Set up Box (STB) from a virtualbox (VB) with Ubuntu 22.04 installed. The VB contains the manifest (to create a download link) and the boot image as a .bin file. The DHCP settings are properly configured. I have checked all the settings and everything is working perfectly fine. Only the problem, the STB is unable to download the bootimage from the VB. It gives Socket Timeout error. I tried to download the same bin file on my local machine using curl and it is downloaded without any problem. I don’t know if I made the right move, but I have even tried to increase keepalive time at /proc/sys/net/ipv4/tcp_keepalive_time from default 7200 to 27200 but no luck. So, I wonder what could go wrong, and asking for help to solve the problem. There are so many similar questions, but none of them is exactly matching my situation.