[lug] sendmail not accepting

Chip Atkinson catkinson at circadence.com
Wed Oct 31 12:01:10 MST 2001


It looks like sendmail is only listening on ip address 127.0.0.1 as some 
of the other posts pointed out.  If you look at the output of the 
netstat command you'll see it's listening on 127.0.0.1:25 and not 
0.0.0.0:25.  I'd start digging into sendmail's configuration. (Rob 
Riggs' and Blaine Berger's posts)

Chip

Gary Hodges wrote:

> Chip Atkinson wrote:
> 
> 
>> Ok, how about ipchains -L ?  You can also use "netstat -lenp" to show
>> what ports are being listened on and by who.
> 
> 
> Sorry, I didn't include the ipchains on the previous post.  I did have all the
> firewall settings turned off, so ipchains -L didn't do anything.  I just
> configured using lokkit which in turn edits the /etc/sysconfig/ipchains file.
> Running ipchains -L now gives:
> 
> [root at space redhat]# /sbin/ipchains -L
> Chain input (policy ACCEPT):
> target     prot opt     source                destination           ports
> ACCEPT     tcp  -y----  anywhere             anywhere              any ->   ssh
> 
> ACCEPT     tcp  -y----  anywhere             anywhere              any ->
> telnet
> ACCEPT     tcp  -y----  anywhere             anywhere              any ->
> smtp
> ACCEPT     tcp  -y----  anywhere             anywhere              any ->
> http
> ACCEPT     tcp  -y----  anywhere             anywhere              any ->   ftp
> 
> ACCEPT     all  ------  anywhere             anywhere              n/a
> REJECT     tcp  -y----  anywhere             anywhere              any ->
> 0:1023
> REJECT     tcp  -y----  anywhere             anywhere              any ->   nfs
> 
> REJECT     udp  ------  anywhere             anywhere              any ->
> 0:1023
> REJECT     udp  ------  anywhere             anywhere              any ->   nfs
> 
> REJECT     tcp  -y----  anywhere             anywhere              any ->
> x11:6009
> REJECT     tcp  -y----  anywhere             anywhere              any ->   xfs
> 
> Chain forward (policy ACCEPT):
> Chain output (policy ACCEPT):
> 
> And now for the netstat command...
> 
> [root at space redhat]# netstat -lenp
> Active Internet connections (only servers)
> Proto Recv-Q Send-Q Local Address           Foreign Address         State
> User       Inode      PID/Program name
> tcp        0      0 0.0.0.0:32768           0.0.0.0:*               LISTEN
> 29         986        743/rpc.statd
> tcp        0      0 127.0.0.1:32769         0.0.0.0:*               LISTEN
> 0          1120       925/xinetd
> tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN
> 0          925        715/portmap
> tcp        0      0 0.0.0.0:6000            0.0.0.0:*               LISTEN
> 0          1323       1131/X
> tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN
> 0          1124       925/xinetd
> tcp        0      0 0.0.0.0:23              0.0.0.0:*               LISTEN
> 0          1123       925/xinetd
> tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN
> 0          1171       965/sendmail: accep
> udp        0      0 0.0.0.0:32768           0.0.0.0:*
> 29         983        743/rpc.statd
> udp        0      0 0.0.0.0:919             0.0.0.0:*
> 0          959        743/rpc.statd
> udp        0      0 0.0.0.0:111             0.0.0.0:*
> 0          924        715/portmap
> Active UNIX domain sockets (only servers)
> Proto RefCnt Flags       Type       State         I-Node PID/Program name
> Path
> unix  2      [ ACC ]     STREAM     LISTENING     1189   984/gpm
> /dev/gpmctl
> unix  2      [ ACC ]     STREAM     LISTENING     1424   1144/gnome-session
> /tmp/.ICE-unix/1144
> unix  2      [ ACC ]     STREAM     LISTENING     1478   1238/sawfish
> /tmp/.sawfish-hodges/space.srrb.noaa.gov:0.0
> unix  2      [ ACC ]     STREAM     LISTENING     1859   1297/fam
> /tmp/.fam_socket
> unix  2      [ ACC ]     STREAM     LISTENING     1324   1131/X
> /tmp/.X11-unix/X0
> unix  2      [ ACC ]     STREAM     LISTENING     1573   1266/panel
> /tmp/orbit-hodges/orb-1626138425717714682
> unix  2      [ ACC ]     STREAM     LISTENING     1590   1270/gnome-name-ser
> /tmp/orbit-hodges/orb-7601558321012149050
> unix  2      [ ACC ]     STREAM     LISTENING     1609   1262/nautilus
> /tmp/orbit-hodges/orb-1723935621371739279
> unix  2      [ ACC ]     STREAM     LISTENING     1629   1275/oafd
> /tmp/orbit-hodges/orb-16417518361778895955
> unix  2      [ ACC ]     STREAM     LISTENING     1645   1280/gconfd-1
> /tmp/orbit-hodges/orb-1930181074942915576
> unix  2      [ ACC ]     STREAM     LISTENING     1243   1054/xfs
> /tmp/.font-unix/fs7100
> unix  2      [ ACC ]     STREAM     LISTENING     1752   1285/tasklist_apple
> /tmp/orbit-hodges/orb-912619300574470248
> unix  2      [ ACC ]     STREAM     LISTENING     1757   1287/deskguide_appl
> /tmp/orbit-hodges/orb-3990366991409679902
> unix  2      [ ACC ]     STREAM     LISTENING     1796   1290/multiload_appl
> /tmp/orbit-hodges/orb-2067192060490740421
> unix  2      [ ACC ]     STREAM     LISTENING     1836   1295/clockmail_appl
> /tmp/orbit-hodges/orb-390667730299657831
> unix  2      [ ACC ]     STREAM     LISTENING     1874   1303/nautilus-throb
> /tmp/orbit-hodges/orb-16167212172119631044
> unix  2      [ ACC ]     STREAM     LISTENING     1927   1311/hyperbola
> /tmp/orbit-hodges/orb-14092928651793276019
> unix  2      [ ACC ]     STREAM     LISTENING     1989   1315/nautilus-news
> /tmp/orbit-hodges/orb-13681319871193863731
> unix  2      [ ACC ]     STREAM     LISTENING     2013   1317/nautilus-notes
> /tmp/orbit-hodges/orb-2470250051119088903
> unix  2      [ ACC ]     STREAM     LISTENING     1561   1259/magicdev
> /tmp/orbit-hodges/orb-20174103211311007076
> unix  2      [ ACC ]     STREAM     LISTENING     2078   1313/nautilus-histo
> /tmp/orbit-hodges/orb-1195298551528578712
> 
> 
> 
>> Gary Hodges wrote:
>> 
>> 
>>> Chip Atkinson wrote:
>>> 
>>> 
>>> 
>>>> Can you ping the IP address of space?
>>> 
>>> 
>>> Yes.
>>> 
>>> 
>>> 
>>>> You should verify that the IP address is the IP address of the machine
>>>> that you are on.  Use ifconfig eth0 (assuming only one ethernet card).
>>> 
>>> 
>>> ~>/sbin/ifconfig eth0
>>> eth0      Link encap:Ethernet  HWaddr 00:10:5A:67:86:39
>>>           inet addr:140.172.144.174  Bcast:140.172.144.255
>>> Mask:255.255.255.0
>>>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>>           RX packets:628 errors:0 dropped:0 overruns:0 frame:0
>>>           TX packets:235 errors:0 dropped:0 overruns:0 carrier:0
>>>           collisions:0 txqueuelen:100
>>>           RX bytes:92449 (90.2 Kb)  TX bytes:16343 (15.9 Kb)
>>>           Interrupt:11 Base address:0xe000
>>> 
>>> 
>>> Just for kicks...
>>> 
>>> ~>ps auxw | grep sendmail
>>> root       965  0.0  0.3  5300 1996 ?        S    10:55   0:00 sendmail:
>>> accepting connections
>>> 
>>> Cheers,
>>> Gary
>>> 
>>> 
>>> 
>>> 
>>>> Gary Hodges wrote:
>>>> 
>>>> 
>>>> 
>>>>> On a mostly fresh install of RH 7.2 I'm unable to send email to this
>>>>> machine.  I can send mail from this machine to this machine, just not
>>>>> from another machine.  If I run the following command :
>>>>> 
>>>>> ~>telnet localhost 25
>>>>> Trying 127.0.0.1...
>>>>> Connected to localhost.
>>>>> Escape character is '^]'.
>>>>> 220 space.srrb.noaa.gov ESMTP Sendmail 8.11.6/8.11.6; Wed, 31 Oct 2001
>>>>> 10:34:06 -0700
>>>>> 
>>>>> If I run:
>>>>> ~>telnet space 25
>>>>> Trying 140.172.144.174...
>>>>> telnet: connect to address 140.172.144.174: Connection refused
>>>>> 
>>>>> So I guess sendmail is working, but for some reason it is not accepting
>>>>> connections to the machine name.  I feel like it must be how I've set up
>>>>> networking, but I've tried a bunch of different things there with no
>>>>> luck.  I have also tried the "no firewall" setting.
>>>> 
>>> _______________________________________________
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>> 
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> 
> 
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