Re: [SLE] exim bashes firewall

From: Sandy Drobic (suse-linux-e_at_japantest.homelinux.com)
Date: 10/13/05

  • Next message: Anders Norrbring: "Re: [SLE] File size limit?" 
    Date: Thu, 13 Oct 2005 14:08:50 +0200
To: suse list <suse-linux-e@suse.com>

    Chadley Wilson wrote:

    >Hi Sandy, and all
    >
    >The firewall is pointing to our internal DNS, after a good look it is
    >also running its own DNS, ie named. In /etc/resolv.conf I first point it
    >to our internal dns and then to our ISP, removing the localhost entry.
    >
    >At this point the Internet speed is greatly improved, So before removing
    >the local host entry our top download speed would be about 476 bytes
    >after removing it we are now getting up to 106KB
    >
    >
    >
    That smells like dns time-outs.

    >But the problem is that our mail to only one of a our branches does not
    >route.
    >
    >
    Then debug that route. What do the server logs show when you send mail
    to that problem server?

    >Now the mail server setup is a big mystery too, we are running a windows
    >mail server on 172.100.1.21 and it forwards all the mail to our
    >firewalls mail server exim on 172.100.0.1. Exim or the firewall then
    >sends it out ?
    >
    >
    Exim is sending the mail. Though I can't help you with any details on
    exim or sendmail.

    >I have asked the ISP to register an MX record for me for the mail server
    >and I will move it into a DMZ. This should solve this unexplainable
    >problem. Will let you know how it goes....
    >
    >
    What does the log of the receiving server show when you try to send mail?

    Sandy 

    -- 
Check the headers for your unsubscription address
For additional commands send e-mail to suse-linux-e-help@suse.com
Also check the archives at http://lists.suse.com
Please read the FAQs: suse-linux-e-faq@suse.com
  • Next message: Anders Norrbring: "Re: [SLE] File size limit?"

    Relevant Pages

    • Re: SP4 kills DNS?
      ... What OS is the firewall? ... not haveing a WINS server configured. ... DNS for AD ... All internal DNS clients NIC\IP properties must specify SOLELY ...
      (microsoft.public.win2000.dns)
    • Re: CEICW fails at firewall config
      ... Do you or do you not have ISA 2000 or ISA 2004 installed on the SBS server? ... Do you have 2 NICs in the SBS? ... CEICW fails on firewall configuration every time. ... >>> Call to Creating the protected networks access rule returned ok. ...
      (microsoft.public.windows.server.sbs)
    • Re: Recycler security issues on IIS server
      ... > latest upates to the server. ... > like to see the server put behind our firewall, ... other software, install all patches, IISlockdown, URLscan, use the correct ... the procedures you follow may vary depending on your security needs. ...
      (microsoft.public.inetserver.iis.security)
    • Re: ISA SERVER NOT STARTING
      ... I delete the nat/basic firewall and stop and started the RRAS an tried to ... There were no critical events in the DNS Server Log in the last 24 hours. ... An error occurred during logon ... Caller User Name: - ...
      (microsoft.public.windows.server.sbs)
    • Re: For Microsoft Partners and Customers Who Cant Download or Access
      ... to reconfigure the firewall, but to use a static IP on your client ... and to make sure that the DNS server entries on the client are ... Microsoft for msdn2.microsoft.com. ... use a static IP and set the DNS server addresses to the DNS ...
      (microsoft.public.dotnet.general)