VPN over DNS relay
Posted: Tue Mar 19, 2019 5:17 pm
I´m thinking about a possible implementation of a VPN server to be acting as a DNS server that would work through DNS relay.
I stumbled into a network that blocked any kind of connection but the DNS requests relayed through the DNS Server provided by the DHCP itself, so it made me think about the possibility to set subdomains (the name of the subdomain can be up to 63 characters as payload) with low TTLs and return packets as TXT records (up to 255 characters) that would be relayed through.
I´m asking here because I don´t know how viable it would be, but it sure got my attention as the TTLs are for mostly DNS updates and not for DNS first propagation of a record.
Best Regards,
Lincoln.
I stumbled into a network that blocked any kind of connection but the DNS requests relayed through the DNS Server provided by the DHCP itself, so it made me think about the possibility to set subdomains (the name of the subdomain can be up to 63 characters as payload) with low TTLs and return packets as TXT records (up to 255 characters) that would be relayed through.
I´m asking here because I don´t know how viable it would be, but it sure got my attention as the TTLs are for mostly DNS updates and not for DNS first propagation of a record.
Best Regards,
Lincoln.