Unable to connect to nt server

activ · n00b Joined: 17 Oct 2002 Posts: 49

I have a server Running nt 4 server, it handles my mail for the time being.
Windows clients have no trouble getting mail from that server (using imap).
Now I try to use kmail and evoltution to get the mail and it can't connect.
Also I've tried to logon to it using samba and it's unable to connect, I am able to ping the server.

ckdake · l33t Joined: 10 Apr 2003 Posts: 889 Location: Atlanta, GA

Are firewalls set up on any of your machines? Are they all on the same subnet? Post some more information and more specific error messages and someone may be able to help.

activ · n00b Joined: 17 Oct 2002 Posts: 49

The specific error message from kmail is "could not connect to host 10.0.0.103".
No firewall is set up on the mail server and I am able to get mail from another server with kmail.
Also I have no firewall on my workstation.

uzik · Apprentice Joined: 17 Apr 2003 Posts: 257

does your nt 4 mail server want to validate the user?

Did you try connecting to the mail server using telnet and simulating
an IMAP session and see if you can get a clue what's going on?

I've done this with pop to debug user validation problems before

activ · n00b Joined: 17 Oct 2002 Posts: 49

hmmm, I cant even telnet to the server.

devon · l33t Joined: 23 Jun 2003 Posts: 943

Can you console on to the NT server? You should be able to open a DOS window and "netstat -an | more" and make sure IMAP (143/tcp) is running.

uzik · Apprentice Joined: 17 Apr 2003 Posts: 257

To test smtp connectivity I went to my linux box and entered

telnet smtp-machine-ip-address 25

since it uses port 25 for that protocol. I don't know the protocol port for imap,
but it should connect and print something. If it refuses connection or does not connect then you know either the firewall on one or more machine is blocking access or the imap server is not running on the machine. if you do get something you might have a user validation issue. If you know how imap works you can type in the appropriate commands and see if it asks for, and or refuses you based on what user name you enter. With SMTP it's fairly easy to do this. Sorry I can't tell you exactly what to do with imap.

rogue · Posted: Fri Jul 11, 2003 2:32 am Post subject:

from your gentoo box telnet to port 143 on the nt machine. if it connects, then something odd is happening with kmail and evolution.

if it doesn't connect, try telnetting to 993 which is the imap over ssl port (if you are using ssl)

if neither of those work, can you telnet from windows clients to these ports? it seems strange that if there is no explicit firewall blocking the gentoo box that this would happen
_________________
(rob)

activ · n00b Joined: 17 Oct 2002 Posts: 49

Sorry for the late reply. I've been away for a few days.
I've tried telnetting to mentioned ports with no success. Also I've tried to telnet to them from another pc , that does work.
I've also tried to use samba to move files from my laptop to this pc , that worked fine.
So It appears all networking works on both machines but when they get together it doesn't work.

devon · l33t Joined: 23 Jun 2003 Posts: 943

Are there any access rules on the NT server? Like permitted IPs? Does the Event Log say anything?

activ · n00b Joined: 17 Oct 2002 Posts: 49

If there are access rules I don't know where to find them.
I checked te event log and there's nothing really important, netwerk card drive reports some downtime but it's not often and not related to my connection attempts.
I now tried to ssh out of the nt server to my pc, that also doens't work (while ssh'ing elsewhere does work)

devon · l33t Joined: 23 Jun 2003 Posts: 943

ben · Posted: Wed Jul 16, 2003 2:57 pm Post subject:

Maybe something is wrong with the IP level. (if connection is hazardous from AND to the gentoo box)

what gives ifconfig -a on the gentoo box, and ipconfig /all on a dos window on the nt box. It may be a wrong mask .

Ben

activ · n00b Joined: 17 Oct 2002 Posts: 49

ifconfig -a

eth0 Link encap:Ethernet HWaddr 00:0C:6E:4E:75:05
inet addr:10.0.0.150 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:26041 errors:3 dropped:0 overruns:0 frame:3
TX packets:31692 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:11009577 (10.4 Mb) TX bytes:11714285 (11.1 Mb)
Interrupt:22

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:22 errors:0 dropped:0 overruns:0 frame:0
TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1261 (1.2 Kb) TX bytes:1261 (1.2 Kb)

ipconfig /all

Hostname .......mail
dnsservers......194.109.6.66
194.109.9.99
Node type......hybrid
netbios scope id
iprouting enabled..no
wins proxy enabled...no
netbios resolution uses dns..no

Ethernet adapter CpqNF31:
Description...Compaq Netflex-3 driver, version 4.31
Physical adress..... (mac adress here)
DHCP enabled...no
ip adress....10.0.0.103
subnet mask...255.255.255.0
default gateway....10.0.0.138
primary wins server...172.192.2.27
secondary wins server...172.192.2.22

ben · Posted: Fri Jul 18, 2003 6:33 pm Post subject:

Please allow me to summarize what I understand from your problem:

you have a gentoo box
one or more windows bos (client)
one nt server (email server)

you can ping form everywhere to everywhere
you can telnet imap and imapssl ports to the nt server from windows box but not from gentoo
you can ssh from you nt server to evert host excpet the gentoo one
your ipconfig looks good
your nt box does not ip routing and does not do netbios over dns

So I think the problem may come from the fact that windows relies quite a bit on netbios, but linux does not. So maybe, the server imap wont serve un unkown name (the gentoo box). So you may have to check the server parameter to disable checking the netbios name, or give a netbios name to the gentoo box. I cant help further because I just know enough of netbios to hate it.

HTH

Ben

devon · l33t Joined: 23 Jun 2003 Posts: 943

rogue · Posted: Fri Jul 18, 2003 8:40 pm Post subject:

i thought netbios / winns was only for the "network neighborhood" in windows so i'm not sure that's directly relevant. all the mail stuff should be done over tcp/ip and not through netbios shouldn't it? it might be worth doing what devon said and removing the WINS servers though.

although if you have samba installed on the gentoo box it might be worth seeing if it can connect to the windows server. or you could just telnet to port 139 and see if it connects.

what does "route" show on the gentoo box and "route print" show on the nt box? maybe something is screwed up with regards to that
_________________
(rob)

devon · l33t Joined: 23 Jun 2003 Posts: 943

activ · n00b Joined: 17 Oct 2002 Posts: 49

@ben: yes that's a correct summup.
@devon: Yes, I'll try and post the results.

activ · n00b Joined: 17 Oct 2002 Posts: 49

Weird very weird. I removed the wins'es and rebooted.
I don't know if it's related but I was then able to telnet to the box one time (I tried port 25).

devon · l33t Joined: 23 Jun 2003 Posts: 943

activ · n00b Joined: 17 Oct 2002 Posts: 49

I could put the wins adresses back but I don't have any anyway.
I telnettted to port 25 of the mailserver and then did a netstat on it.
That tells me:
Proto local_adress foreign_source state
TCP mail:smtp tm3.local SYN_RECEIVED

Another netstat a few seconds later that message was gone.

devon · l33t Joined: 23 Jun 2003 Posts: 943

Did you telnet to port 25 from your Gentoo box to the mail server and then do "netstat" on your mail server?

karl420 · Posted: Mon Jul 21, 2003 9:04 pm Post subject:

Did you ever to an