Just out of curiosity: what type of install did you do? RedHat has vastly increased security concerns with 7.1; including having most services off by default. On Wed, 18 Apr 2001, Robert Anderson wrote: > > I'm sorry if this has been going out on the list all morning but it > needs to be said and at this time I have no way of knowing if it has > been. If it was said send me PRIVATE mail so that we don't just waste > bandwidth saying so. > > I have not recieved any mail this morning since I did a RedHat 7.1 > upgrade. If you upgrade or do a scratch install with RedHat 7.1 you > too will have the following problems. I'll explain the problem and > give the solution. > > First the problem: > ------------------ > > If your linux box recieves mail directly (NOT from an IMAP/POP query ) > using sendmail on port 25, the RedHat 7.1 shipped sendmail will break > things. > > There are actually TWO problems: > > (Problem 1) By default sendmail is only listening to the local loopback > interface. You can tell this with the following command: > > netstat -tan > > Bad entry: > > tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN > > Good entry: > > tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN > > > (Problem 2) Sendmail is now using tcpwrappers. To check this look in > the logs: "tail /var/log/maillog". And see if you have > any "rejection" lines. They will look something like this: > > Apr 18 13:26:58 q sendmail[1681]: f3IHQwW01681: tcpwrappers > (q.sr.unh.edu, 132.177.241.27) rejection > > The Solutions: > -------------- > > Two problems, two solutions, unless you decide to get your mail by > some other means. Please note that Solution 1 has a couple of steps. > > (Solution 1) In STEP 1 we make sendmail listen on your normal > interfaces by editting "/etc/mail/sendmail.mc" and > commenting out (put dnl in front of) "DAEMON_OPTIONS" > to look like the following: > > ---------------------------------------------------------------------- > dnl This changes sendmail to only listen on the loopback device 127.0.0.1 > dnl and not on any other network devices. Comment this out if you want > dnl to accept email over the network. > dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA') > dnl We strongly recommend to comment this one out if you want to protect > dnl yourself from spam. However, the laptop and users on computers that do > dnl not have 24x7 DNS do need this. > dnl FEATURE(`accept_unresolvable_domains')dnl > dnl FEATURE(`relay_based_on_MX')dnl > MAILER(smtp)dnl > MAILER(procmail)dnl > ---------------------------------------------------------------------- > > For STEP 2 you must have sendmail-cf installed (found on RedHat 7.1 > disk 1). You still need to run the following commands for the STEP 1 > changes to take affect. The first command is described in the top of > the file you edited in step 1: > > m4 /etc/mail/sendmail.mc > /etc/sendmail.cf > > In STEP 3 you will need to restart sendmail like so: > > /etc/init.d/sendmail restart > > > > (Solution 2) Add a "sendmail: all" line to your /etc/hosts.allow file. > That can be done easily with you favorite editor or the > command: "echo 'sendmail: all' >>/etc/hosts.allow" > > > I hope this helps somebody from having to find all this out on there > own the way I did. > > -------------------------------------------------------------- > Robert E. Anderson email: [EMAIL PROTECTED] > Systems Programmer phone: (603) 862-3489 > UNH Research Computing Center fax: (603) 862-1761 > -------------------------------------------------------------- > > ********************************************************** > To unsubscribe from this list, send mail to > [EMAIL PROTECTED] with the following text in the > *body* (*not* the subject line) of the letter: > unsubscribe gnhlug > ********************************************************** > -- Thomas M. Albright Albright Enterprises - "The Small Business Solution" http://www.albrightent.com/ ********************************************************** To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the following text in the *body* (*not* the subject line) of the letter: unsubscribe gnhlug **********************************************************
