Hi @ccaffy , At the risk of mentioning what you already know ... the correct behaviour is defined by RFC 3230. In particular, the server should simply ignore requested algorithms if it doesn't understand or support them. For example, if the server doesn't understand `unknown-alg` then a request with: Want-Digest: adler32, unknown-alg should be treated the same as a request for: Want-Digest: adler32 -- Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1707#issuecomment-1377221339 You are receiving this because you are subscribed to this thread. Message ID: <[log in to unmask]> ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1