Date: Thu, 9 Aug 2001 10:20:02 -0400 From: Bill Vermillion <bill@wjv.com> To: Fabrizio Ravazzini <freefabri@yahoo.it> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: SMTP very very slow! Message-ID: <20010809102002.D31639@wjv.com> In-Reply-To: <20010809130902.66148.qmail@web20101.mail.yahoo.com>; from freefabri@yahoo.it on Thu, Aug 09, 2001 at 03:09:02PM %2B0200 References: <20010809083835.C30948@wjv.com> <20010809130902.66148.qmail@web20101.mail.yahoo.com>
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On Thu, Aug 09, 2001 at 03:09:02PM +0200, Fabrizio Ravazzini thus sprach: > I'll better check the names resolving, I put the names > of the 3 machines in /etc/hosts and the default route > is the gateway OpenBSD connected to Internet with ppp. > But why are the other services such as > telnet,ftp,imap,webmail so fast? Hey -that's not what you said. > > > I tried to telnet on the port 25 of the FreeBSD box but the > > > daemon hanged me there for several minutes and then answered > > > and all worked ok. Telnet and ftp will use the reverse IP. The others don't. Ftp and telnet will be slow, and services such as sendmail can be slow. And if you are trying to get to a machine that is NOT on your network the DNS >>THE FAR MACHINE<< uses must be able to reverse your IP's. I used to do work on a remote system and the provider I was using did not do reverse on their IPs, so I put both banks of IPs my provider used in my area [512 IPS] into the /etc/hosts on the far machine, and I connected almost instantly. > > -- Bill Vermillion <bill@wjv.com> ha scritto: > On > Thu, Aug 09, 2001 at 02:06:15PM +0200, Fabrizio > > Ravazzini thus sprach: > > > I tried to telnet on the port 25 of the FreeBSD > > box > > > but the daemon hanged me there for several minutes > > and > > > then answered and all worked ok. > > > This also for the pop3, when I try to poll the > > FreeBSD > > > machine I have to wait several minutes to get an > > > answer, but after that all works well. > > > > Slow ftp/telnet/xxx seems to be one of the most > > frequently asked > > questions on any Unix related group I've seen and it > > all boils > > down to three letters DNS. > > > > The far side agents try to authenticate the name by > > looking up from > > the IP they get. If there is no reverse mapping - > > it can take well > > over a minute to search all their namesevers for a > > possible match - > > then it will 1) let you login or 2) reject you > > completely - and a > > great many sites will reject you if you can be > > authenticated. > > > > You can control the DNS for your machines. Make > > sure everthing is > > correct AND that whereever you get service from is > > properly > > reversing your names. If not change providers - > > like I had to. > > > > -- > > Bill Vermillion - bv @ wjv . com > > ______________________________________________________________________ > Do You Yahoo!? > Il tuo indirizzo gratis e per sempre @yahoo.it su http://mail.yahoo.it > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > -- Bill Vermillion - bv @ wjv . com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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