As the server replied with 481, I assume the credentials you providied were not correct. Did you send the command „USER PASS <password>“ as written, or did you edit the session log and replaced your real password with the string “<password>“? br Jörg

Am 12.06.2023 um 04:29 schrieb peter@easthope.ca:

Aside from understanding how a stream is involved in base64 encoding, authentication works for Oberon Mail in A2.

Therefore I'm emboldened to work on authentication for NNTP. With simple additions, the module reports this.

--- NNTP host = reader443.eternal-september.org user = PeterE RCV: 200 news.eternal-september.org InterNetNews NNRP server INN 2.8.0 (20230418 snapshot) ready (posting ok) SND: CAPABILITIES RCV: 101 Capability list: RCV: VERSION 2 RCV: IMPLEMENTATION INN 2.8.0 (20230418 snapshot) RCV: AUTHINFO USER SASL RCV: COMPRESS DEFLATE RCV: HDR RCV: LIST ACTIVE ACTIVE.TIMES COUNTS DISTRIB.PATS DISTRIBUTIONS HEADERS MODERATORS MOTD NEWSGROUPS OVERVIEW.FMT SUBSCRIPTIONS RCV: OVER RCV: POST RCV: READER RCV: SASL GSS-SPNEGO GSSAPI SCRAM-SHA-256 SCRAM-SHA-1 GS2-KRB5 GS2-IAKERB DIGEST-MD5 NTLM CRAM-MD5 PLAIN LOGIN RCV: STARTTLS RCV: XPAT RCV: . SND: AUTHINFO USER PeterE RCV: 381 Enter password SND: AUTHINFO PASS <password> RCV: 481 Invalid credentials RCV: 480 Authentication required for command 480 Authentication required for command

The user and password allow interactive login in the browser. Fairly sure they are correct. Yet authentication fails. (?)

Why does the server show capability "AUTHINFO USER" and then refuse authentication?

SASL authentication is required?

Thanks, ... P.L.

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