Fedora Networking :: Telnet To SMTP From Remote Not Working

Jul 10, 2011

I have a sendmail daemon running on Linux, I can telnet @ port 25 from local shell, however if I telnet from a remote system @ port 25, it doesn't work. There is no firewall in between.

View 3 Replies


ADVERTISEMENT

Networking :: Telnet: Unable To Connect To Remote Host: Connection Refused

Jun 12, 2011

I am running CentOS 5.1 on VMware on Win 7 On CentOS I added Bridged network adapter and the server is connected to internet without any problems, but when I telnet any server on port 25 I get connection timeout.

Code:

telnet f.mx.mail.yahoo.com 25
Trying 98.137.54.237...
telnet: connect to address 98.137.54.237: Connection timed out
telnet: Unable to connect to remote host: Connection timed out

I stopped all servers, iptables and sendmail on the linux server and the firewalls on the win 7 but still getting the same error! I added new network adapter ( host-only ) and tried to telnet the win machine from vmware Linux but I got connection refused

Code:

telnet 192.168.71.1 25
Trying 192.168.71.1...
telnet: connect to address 192.168.71.1: Connection refused
telnet: Unable to connect to remote host: Connection refused

[code]....

View 4 Replies View Related

Networking :: Telnet: Unable To Connect To Remote Host: Connection Refused - LAN

Nov 10, 2010

When i am trying to telnet to a machine connected in our LAN ..

telnet: Unable to connect to remote host: Connection refused

What's the reason for this? how do i establish a connection? I am using ubuntu 10.04.

View 8 Replies View Related

General :: Telnet To Smtp.gmail.com 587 Not Connecting?

Aug 27, 2010

In my home we have got an internet connection which is connected to desktop machine having two network cards. One card is connected to external internet and second is used for internal LAN.

We have installed a proxy on desktop machine so that we can connect to internet through proxy. So we are not able to telnet to smtp.gmail.com 587 from laptops of internal LAN laptop installed with ubuntu and fedora.

At the same time we are able to ping smtp.gmail.com from the desktop machine which is exposed to internet.

I want to automate email through shell script using smtp.gmail.com.

View 5 Replies View Related

Fedora Servers :: Able To Telnet To The Server Via A Remote Connection \ Will Not Accept Mail?

Feb 18, 2009

I am able to telnet to the server via a remote connection, but for some reason, it will not accept mail. ere is the bounce back email I am getting.Quote:This is the mail system at host smtp.mydomain.net.I'm sorry to have to inform you that your message could notbe delivered to one or more recipients. It's attached below.For further assistance, please send mail to postmaster.If you do so, please include this problem report. You candelete your own text from the attached returned message.The mail system

<root@mydomain.net>: temporary failure. Command output: pipe: fatal: pipe_command:
execvp /usr/bin/perlbin/vendor/spamc: No such file or directory
Reporting-MTA: dns; smtp.mydomain.net

[code]....

View 11 Replies View Related

Red Hat / Fedora :: Telnet - IP - Is Giving Unable To Connect To Remote Host - Connection Refused

Nov 26, 2010

I am doing some R&D on 11g RMAN in oracle at home. i have installed oracle enterprise linux and i have installed oracle software. when i am trying to configure listener, it is error-ed out. i have verified that telnet with the port is not working and i am seeing connection refused error.

View 3 Replies View Related

General :: Send A Mail By Communicating Directly With An SMTP Server In Telnet?

Jan 20, 2010

How to communicate with an SMTP server with telnet, in order to send a mail?

telnet smtp.something.somewhere 53 Trying
10.xxx.xxx.xxx...
Connected to smtp.something.somewhere.
Escape character is '^]'.

And that is as far as I got. What do I have to do after?

What do I have to write after "HELO"?

View 3 Replies View Related

Networking :: Telnet Is Not Working With Iptables?

Sep 29, 2009

i want to open specific port using iptables i.e 3159 Whenever i tried to telnet it generates the following error

Code:

# telnet 172.16.4.100 3195
Trying 172.16.4.100...
telnet: connect to address 172.16.4.100: No route to host
telnet: Unable to connect to remote host: No route to host

but when I stopped iptables

Code:

# service iptables stop

Its working fine

i added the ports in iptables i.e.

Code:

#iptables -A INPUT -p tcp --dport 3195 -j ACCEPT

for safe side I also added telnet port

Code:

# iptables -A INPUT -p tcp --dport 23 -j ACCEPT

but result was same.... In short telnet works without iptables but with iptables it generates the error mentioned above

View 10 Replies View Related

Networking :: Does The Command "telnet" Works When Remote And Local Are Different Operating System?

Feb 12, 2009

Is it possible to log into a remote windows computer from my local linux computer and vice-versa using the "telnet" command?

View 2 Replies View Related

Networking :: Difference Between Krb5-telnet And Ekrb5-telnet

Feb 18, 2010

I am trying to find the difference between the above two services. Both are under xinetd and can someone please explain the difference between them (is one more secure than the other one?)

View 1 Replies View Related

Server :: Telnet To Smtp Server Is Closing Immediately?

Apr 18, 2011

I've configured postfix on my linux server. For the most part, I got everything working (IMAP, apache, etc) but for some reason, I can't get postfix to work remotely. Postfix works locally to send mail. E.g. when I telnet locally to port 25. However, when I try to telnet from outside, the connection closes almost immediately. I've looked at various configuration options and tuning enhancements but found nothing helpful. Here is my config:

Code:

main.cf:

#See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default

[code]....

View 4 Replies View Related

Server :: Restrict Remote Telnet Connection + Port 80?

May 5, 2011

Is it possible to restrict telnet connection from remote to my server(linux -centos5)?

=================
Ex : [root@localhost]# telnet 10.0.0.33 80
Trying 10.0.0.33...

[code]...

View 2 Replies View Related

Ubuntu Installation :: Postfix Not Allowing Remote Smtp?

Apr 18, 2010

But I fully have my server and everything up, MySQL, PHP5, Apache2, Postfix, Courier, SQMail, can't remember what else atm.

I installed mailx and used the mail command to send an email to my external email address, worked just fine. sent it to another email, worked as well.

But the problem is, I do 'telnet localhost 25' to test it like they say, it connects. I run 'ehlo localhost' Nothing happens.

I've tried setting it up with Thunderbird on my home pc and it connects to the IMAP & POP servers just fine, but it cannot establish a connection with SMTP, I've tried changing the SMTP port to other ones, still no luck.

Oh BTW, I use Ubuntu 8.04 LTS (Hardy Heron)

View 1 Replies View Related

Fedora Networking :: How To Configure Telnet

Dec 26, 2010

install telnet in fedora 14 then how to configure telnet?

View 13 Replies View Related

General :: Telnet :Unable To Connect To Remote Host:Connection Refused?

Jul 3, 2011

My system is Ubuntu 11Before I typed "telnet localhost" or "telnet localhost 23". I have make this work below:$sudo apt-get install xinetd$vim /etc/xinetd.conf

defaults{
instances=60
log_type=SYSLOGauthpriv

[code]....

View 1 Replies View Related

Ubuntu :: Telnet: Unable To Connect To Remote Host: Connection Refused

Jul 16, 2010

when i try a telnet to a host like that: telnet 10.10.10.10 1234 i got this: telnet: Unable to connect to remote host: Connection refused.

1/ does this mean that the problem is not due to a firewall, but that the host 10.10.10.10 doesn't listen on the port 1234? other way does this mean that my firewall is authorizing traffic on the port 1234?

and when i try a telnet on another port like that: telnet 10.10.10.10 1235 i get: Trying 10.10.10.10 ...

in this case this

2/ does this mean that the firewall is blocking the traffic between my host and the 10.10.10.10 on the port 1235?

View 1 Replies View Related

General :: Telnet - Unable To Connect To Remote Host - Connection Refused

Sep 11, 2009

I did followings:

Code:

But got:

Code:

But as I tried:

Code:

It's OK.

View 1 Replies View Related

Software :: Configure Postfix To Connect To Remote Smtp Server

Oct 23, 2010

Try as I might I cant get postfix to send emails through an external email server (I can succesfully get client software to do it no trouble) After following the howto at:

[code]....

I get 5.0.0 errors re:

Code:

May 6 16:06:32 SERVER1 postfix/error[20357]: 2392F21438: to=<SOME_ADDRESS@hotmail.com>, relay=none, delay=0.17, delays=0.1/0.01/0/0.06, dsn=5.0.0, status=bounced (smtp.live.com)

Here's my main.cf

Code:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no

[code]...

I get basically the same error no matter what smtpserver/username/password combination I use leading me to believe its my setup and not my username/password

View 1 Replies View Related

Software :: Configure Postfix To Connect To Remote Smtp Server?

May 5, 2010

Try as I might I cant get postfix to send emails through an external email server (I can succesfully get client software to do it no trouble) After following the howto at: [URL] I get 5.0.0 errors re:

Code:
May 6 16:06:32 SERVER1 postfix/error[20357]: 2392F21438: to=<SOME_ADDRESS@hotmail.com>, relay=none, delay=0.17, delays=0.1/0.01/0/0.06, dsn=5.0.0, status=bounced (smtp.live.com)
Here's my main.cf
Code:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases

[Code]....

View 5 Replies View Related

Networking :: Local Smtp Server And Smtp Server Of Domain Registrar Simultaniosly?

Nov 27, 2008

I have a domain name registered in asianet.com, they provide email service also, can i use local mail server and registrar's smtp server at same time?

View 5 Replies View Related

Fedora Networking :: Telnet Works External In DMZ Not With Local IP

Jun 8, 2011

I'm running Telnet Server, VFTP, and VNC on a Fedora 14 box. The box's internal IP is 192.168.1.222 This machine is configured to live in the DMZ, The firewall is up on both the router and this box. I can remote in from home using our external IP. I can FTP. I can Telnet. All using our external IP. When i'm in the office, i can remote in using our external IP. I can FTP. I can Telnet. Again, all with the external IP. If i attempt to telnet 192.168.1.222 i get a connection refused. i can ping the 192.168 address

nmap tells me that all 1000 ports on 192.168.1.222 are closed
nmap tells me that my expected ports are open on the external IP.

.... This is a relatively new conundrum as it "used to work", and only appears not to since our last reboot (power outage). I know i have to be missing something simple here, but i differ to the experts.

View 5 Replies View Related

Fedora Networking :: Set New Smtp Server To The Msmtprc File?

Oct 12, 2010

I met some problems when I set my new smtp server to the msmtprc file. I work in the HKUST and the mail asks for TLS authentication, I do not know where the problem is, but when I test the smtp server like this

Code:
echo "test mail of UST" | msmtp
-a default myname@ust.hk
It just says
Code:
msmtp: TLS handshake failed: The

[Code]...

View 3 Replies View Related

Fedora Networking :: Telnet Works Localhost But Not Network / Firewall Disabled

Jun 3, 2011

I'm working on setting up access for our developer via Telnet, we are on a local network behind a physical firewall. I set up the standard Telnet service for Fedora15 and from localhost I can login via any user and root.... However I cannot login from another terminal on the LAN, even though I can ping and FTP to the fedora15 box. I added the firewall rules for telnet, that did not work, so I disabled the firewall, still cannot get a connection via port 25. I feel either port 25 is closed in another manor or the telnet is restricted to the localhost.

Also I cannot login to root to configure the Firewall Desktop GUI, only standard users, is this an issue? I also cannot login to the console as root even though I use the correct password.I can only su to root and sometimes it is a PITA. There must be some settings to clear these issues up...

View 2 Replies View Related

Ubuntu Networking :: Remote Desktop Not Working?

Feb 16, 2011

I have a Laptop with Ubuntu 10.04 and a Netbook with Remix 10.04. I'm trying to connect by Remote Desktop from the Laptop to the Netbook. Remote Desktop wasn't installed by default in Remix so I installed it via software centre. I then configured Remote desktop in both machines. When I do Connect on the laptop all I get is a black screen and then it closes with the message "Connection to host was Closed". This happens when I try either VNC or SSH. The other thing that's odd, although both machines are on the same WLAN and I checked "configure networkautomatically to accept connections" on both machines, the Laptop doesn't find the other machine in Remote Desktop. What am I/have I done wrong or have I ommitted something?

View 4 Replies View Related

Networking :: Udp Client Not Working From Remote Host?

Apr 17, 2010

i have a udp server running at port 60178. when i connect to it from localhost there is no problem. when i use the client from a remote host i am not able to connect. I changed my server firewall settings[Fedora 11] and added "udp 60178" to trusted ports but still nothing happened. I ran wireshark and observed that packets are coming to the server machine but server returns a "Port Unreachable" ICMP message and doesnt give the packet to the application.

View 3 Replies View Related

Ubuntu Networking :: Remote Desktop Stopped Working ?

Mar 8, 2011

I have a remote desktop app for my ipod that i use every now and then, but after about a week and a half of not using remote desktop on either my ipod or my computer, it seems to have stopped working. the problem is with my computer rather than my ipod. when i go to menu>system>preferences>remote desktop, the area where it is supposed to give you the ip address, or whatever it is to connect remotely, is no longer a number, but just the word "localhost". i only saw this after my ipod told me it could not find the host, so i checked and thats when i saw localhost. putting that into the remote desktop app did nothing, so i tried my ip address and that didnt work either. clicking on "localhost" brings up evolution mail which wants me to send it as an email, strangely. not sure whats going on here.

View 2 Replies View Related

General :: Telnet Not Working For Localhost?

Apr 14, 2011

I've tried searching for this peculiar behavior, but couldn't find a solution that works for it - I have installed Redhat on my system and have a listener running on port 7878. I wanted to check if the port is accessible from a machine on the network, and so i telnet-ed from a remote machine and it worked. Now comes the weird problem - I used the same command (telnet xxx.xxx.xxx.xxx 7878) locally and it was able to telnet. However, if I try to connect using localhost, meaning, "telnet localhost 7878" or "telnet 127.0.0.1 7878", it gives me the following error:

Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host: Connection refused

Here is my /etc/hosts entry:

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6

[Code]....

Not sure where the problem is. I expect telnet to connect irrespective of whether i use the IP address OR localhost when i use telnet locally.

View 5 Replies View Related

Server :: Telnet To Port 25 Not Working From Outside?

Mar 25, 2011

I'm trying to test smtp connectivity to my postfix configuration and I can telnet to port 25 from the computer itself but cannot from the outside. I get a connection refused error message. What am I doing wrong? I believe my dns is setup correctly as it seems the telnet can hit the box so I'm fairly sure its not that.

View 14 Replies View Related

Ubuntu Networking :: Remote Desktop Server Stopped Working After Upgrade To 10.10

Oct 11, 2010

Well I guess the topic says it all. I've recently upgraded to Maverick from Lucid all went smoothly until i restarted and realized that the remote desktop server included stopped functioning all of a sudden. tried other vnc servers with no luck.

View 9 Replies View Related

Server :: Is TLS For SMTP Working

Apr 5, 2010

How can I verify if TLS is working for SMTP? I can see when I connect to Dovecot via IMAP4, a TLS session is present but I don't know to configure TLS for SMTP (sending messages).

View 5 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved