Date: Thu, 5 Nov 1998 00:33:58 -0800 From: Don Lewis <Don.Lewis@tsc.tdk.com> To: Poul-Henning Kamp <phk@critter.freebsd.dk>, Nate Williams <nate@mt.sri.com> Cc: Don Lewis <Don.Lewis@tsc.tdk.com>, cvs-committers@FreeBSD.ORG Subject: Re: cvs commit: src/usr.sbin/inetd inetd.c Message-ID: <199811050833.AAA13190@salsa.gv.tsc.tdk.com> In-Reply-To: Poul-Henning Kamp <phk@critter.freebsd.dk> "Re: cvs commit: src/usr.sbin/inetd inetd.c" (Nov 5, 9:13am)
next in thread | previous in thread | raw e-mail | index | archive | help
On Nov 5, 9:13am, Poul-Henning Kamp wrote: } Subject: Re: cvs commit: src/usr.sbin/inetd inetd.c } } >> Well, it is (barely) measurably faster on the two busy mailservers I run. } > } >That makes no sense given Don't analysis. Getting a reset is *MUCH* } >faster than making a full-fledged TCP connection, sending and receiving } >(bogus) data, and then shutting down the connection. } } I think Don assumes that all mail servers run BSD + sendmail. That } doesn't seem to be the case on the Internet I work on. No, I just assume a non-broken TCP stacks. I suppose this might be a bad assumption. I'm curious as to what has a broken TCP stack *and* does ident queries on incoming SMTP connections. } >> The other advantage is that it makes: } >> sysctl -w net.inet.tcp.log_in_vain=1 } >> less noisy on same machines. } > } >???? } } Have you tried it on an mail server which doesn't answer port 113 ? } You get a (possibly 3) messages every time somebody tried to connect } to port 113. I'd expect this to be pretty noisy. The 3 in a row dudes are the broken ones. } With this dummy server in place, you don't get the } noise, so you can see actual portscans and stuff like that. Along with all the connection attempts to port 13x from the Windoze machines trying to find each other. Reminds me of "The Forbin Project". To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199811050833.AAA13190>