Sendmail and multiple IPs

Sendmail and multiple IPs

Post by David Sean McNichol » Thu, 10 Oct 1996 04:00:00



        After installing multiple IPs via hostname files in /etc

hostname.le0    hostname.le0:1  hostname.le0:3  hostname.le0:5
hostname.le0:0  hostname.le0:2  hostname.le0:4  hostname.le0:6

hostname.le0
::::::::::::::
163.7.2.11
::::::::::::::
hostname.le0:0
::::::::::::::
163.7.2.11
::::::::::::::
hostname.le0:1
::::::::::::::
163.7.2.12
::::::::::::::
hostname.le0:2
::::::::::::::
163.7.2.13

etc... etc...

I get the following messages :

Oct  9 14:58:25 netra1 sendmail[18838]: gethostbyaddr() failed for 163.7.2.12
Oct  9 15:03:39 netra1 sendmail[18858]: gethostbyaddr() failed for 163.7.2.12
Oct  9 15:11:20 netra1 sendmail[18891]: gethostbyaddr() failed for 163.7.2.12

This is only the first Virtual after the base IP. My webserver has no
complaints ? any ideas ?

Regards,
        Dave.

David Sean McNicholl
Homepage UK (Systems)

Telephone:  44-(0)374-118090

 
 
 

Sendmail and multiple IPs

Post by Michael Hal » Fri, 11 Oct 1996 04:00:00



  Make sure your reverse name server lookup is valid for those IP
addresses.  It looks like sendmail is trying to find the domain names for
those ips and is failing.

:
: I get the following messages :
:
: Oct  9 14:58:25 netra1 sendmail[18838]: gethostbyaddr() failed for 163.7.2.12
: Oct  9 15:03:39 netra1 sendmail[18858]: gethostbyaddr() failed for 163.7.2.12
: Oct  9 15:11:20 netra1 sendmail[18891]: gethostbyaddr() failed for 163.7.2.12
:
: This is only the first Virtual after the base IP. My webserver has no
: complaints ? any ideas ?
:
:
: Regards,
:       Dave.
:
:
: David Sean McNicholl
: Homepage UK (Systems)

: Telephone:  44-(0)374-118090
:

--

Vyzynz International Inc.
6995 South Union Park Center Swt. 475
Midvale, Ut 84047
Tel 801-568-0999 or 800-582-9466

 
 
 

1. ipconfig - multiple IPs - swapping IP effect on alias IPs?

Hello,

my IP structure looks like this:
# ifconfig -a
 lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
         inet 127.0.0.1 netmask ff000000
 hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
         inet 194.163.186.149 netmask fffffff0 broadcast 194.163.186.159
         ether 0:80:17:28:ae:8f
 hme0:2: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
         inet 194.163.186.158 netmask fffffff0 broadcast 194.163.186.255
 hme0:5: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
         inet 192.168.183.156 netmask ffffff00 broadcast 192.168.183.255

I enable and disable the various alias IPs using plumb and unplumb.
/usr/sbin/ifconfig hme0:1 plumb
/usr/sbin/ifconfig hme0:1 194.163.186.156 broadcast 194.163.186.255 netmask
 255.255.255.240 up

Can I also do a plumb and unplumb with hme:0, the hardware IP of the machine?
I unfortunately do not have a test-machine here. Would hme0:2 and hme0:5
get changed or stay as they are without being influenced?

Thanks,
    Armin

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