Hi Bohdan, On Tue, May 10, 2011 at 12:08 AM, Bohdan Sydor <bohdan@xxxxxxxxxx> wrote: > On 05/10/2011 07:41 AM, Mun wrote: > > > Well, unfortunately my IT dept is claiming their network is fine--and > > therefore the problem lies > > either with my system, or is not worth their time to debug. I am still > > I went ahead and made the changes to the iptables logging as you > suggested. > > When I use swaks to > > send my machine email from an offsite system, I _do_ see messages show up > in > > my /var/log/messages > > file showing some kind of interaction between the offsite system and my > > system. I don't know what is > > being discussed between the systems, but the offsite system does finally > > timeout in it's attemt to connect. > > > Additionally, you can run from a linux box that is in any external > network the following command: > > nmap -p 22,25 yourMachineNameOrIP > > The output should be similar to the this: > > PORT STATE SERVICE > 22/tcp open ssh > 25/tcp open smtp > > OR rather to that: > > PORT STATE SERVICE > 22/tcp open ssh > 25/tcp closed smtp > > > In the report you would see if ports tcp 22 and tcp 25 are remotely > accessible on the mail system. > Here's what I get from the remote side: PORT STATE SERVICE 22/tcp open ssh 25/tcp filtered smtp I don't know what filters are in place; is there any way to get more information about the filters? > > >From the other side, run on your mail server that command: > > netstat -ntlp | egrep ':2(2|5)' > > If the output is like this below > > tcp 0 0 0.0.0.0:22 0.0.0.0:* > LISTEN 1105/sshd > tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN > 1735/sendmail > > you've got a kind of evidence for your IT dept. > Here is what I get on my system: tcp 0 0 127.0.0.1:2208 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN - tcp 0 0 127.0.0.1:2207 0.0.0.0:* LISTEN - tcp 0 0 :::22 :::* LISTEN - Thanks very much for the continued assistance! Regards, -- Mun > > -- > regards > > Bohdan Sydor > www.sydor.net > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
