SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP nm;rport=26810;received=224.10.112.4;branch=foo
Call-ID: 50000
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=foo
CSeq: 42 OPTIONS
WWW-Authenticate: Digest realm="asterisk",nonce="1725272326/c989c8e33871a46bd129124977d56d8b",opaque="7098b76a23fe4cf8",algorithm=MD5,qop="auth"
Server: mikopbx-2023.2.206
Content-Length: 0
