Defining System DNS Server

[Zamanry]

I was able to get the classic 802.1x bypass bridge and interaction setup via the software method. I can interact with a DC via IP, but cannot determine how to set my system-wide DNS server. I can't find a silentbridge variable/parameter that would allow a DNS server be configured. I require DNS so that I can perform Kerberos enumeration and attacks.

I have found a workaround by manually specifying the IP address in commands (where supported) such as nmap -Pn -p 389 <DC-IP> --dns-servers #.#.#.#. But many tools do not support custom DNS servers and instead use the system wide DNS.

Outside of many others, I've attempted to check/configure DNS at:

• /etc/resolv.conf
• NetworkManager +
• /etc/network/interfaces +
• /etc/systemd-resolv +

I read the netifaces Python code and attempted to locate how to set the DNS server this way, but it appears this package does not support this functionality (Issue).

I am guessing one of the underlying silentbridge packages have configured the interfaces somewhere I haven't seen yet and we would need to add a flag to silentbridge to allow at least 2x DNS servers for system wide DNS support.