Linux Telnet Error Connection Closed By Foreign Host
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Connection Closed By Foreign Host Telnet In Linux
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Telnet Connection Closed By Foreign Host Ubuntu
it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top telnet - “Connection closed by foreign host” up vote 6 down vote favorite 1 I want to setup an Apache Spark Cluster but I am not able to communicate from
Connection Closed By Foreign Host. Telnet Postfix
the worker machine to the master machine at port 7077 (where the Spark Master is running). So I tried to telnet to the master from the worker machine and this is what I am seeing: root@worker:~# telnet spark 7077 Trying 10.xx.xx.xx... Connected to spark. Escape character is '^]'. Connection closed by foreign host. The command terminated with "Connection closed by foreign host" immediately. It does not timeout or anything. I verified that the the host is listening on the port and since telnet output shows "Connected to spark." — this also means that the connection is successful. What could be the reason for such behavior? I am wondering if this closing of the connection could be the reason why I am not able to communicate from my worker machine to the master. telnet share|improve this question edited Jul 3 '15 at 9:11 Anthon 47.6k1462125 asked Jul 1 '15 at 17:23 Mor Eru 133116 Is your telnet port (23) allowing access in the iptables on spark? –ryekayo Jul 1 '15 at 18:14 iptables on spark is emp
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Telnet Connection Closed Immediately
is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it connection closed by foreign host smtp works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top telnet fails to connect: Connection closed by foreign host up vote 1 down vote favorite 1 I try to connect to http://unix.stackexchange.com/questions/213364/telnet-connection-closed-by-foreign-host localhost with telnet: % telnet localhost 6311 This connection succeed, but when I connect by external IP of my computer, connection fails: % telnet x.x.x.x 6311 Trying x.x.x.x... Connected to x.x.x.x Escape character is '^]'. Connection closed by foreign host. What could be wrong? linux bash ubuntu telnet share|improve this question asked May 5 '13 at 13:28 sunny 126115 migrated from stackoverflow.com May 6 '13 at 0:42 This question came from our site for professional and enthusiast programmers. Firstly, the http://superuser.com/questions/591901/telnet-fails-to-connect-connection-closed-by-foreign-host site address. Try on SuperUser or ServerFault. –H2CO3 May 5 '13 at 13:29 I checked : % sudo telnet x.x.x.x 6311 same problem... –sunny May 5 '13 at 13:33 It's not a web server there, it is RServe.. Then I don't have any site address... –sunny May 5 '13 at 13:36 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote accepted The problem was with the service ( that was running on 6311) The servise just was not configured to work with remote access. It means, telnet was OK :) share|improve this answer answered May 5 '13 at 18:52 sunny 126115 add a comment| up vote 1 down vote Check what IP server is listening to. I am suspecting that your server is listening to localhost or 127.0.0.1. Make it listen to 0.0.0.0 (probably via some conf file). You can verify it by running netstat -tapnl | grep 6311 Check if it shows 127.0.0.1:6311 or 0.0.0.0:6311 share|improve this answer answered May 5 '13 at 14:48 anishsane 4231414 If this answer solves your problem, you can mark this as accepted answer.. :) –anishsane May 14 '13 at 7:00 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting you
on Wed, 13 Oct 1999 Dear James: I've had a problem with Red Hat 6.0 while trying to telnet from one machine to another. All the configurationfiles seems http://www.tldp.org/LDP/LGNET/48/tag/15.html to be OK, but when I telnet, it gives me the message "connection closed by foreign host..." Any suggestion? best regards, Martin O. Mauri What does the syslog https://www.howtoforge.com/community/threads/postfix-connection-closed-by-foreign-host.7821/ (/var/log/messages) say on the server? This message indicates that the remote system is disconnecting you. Probably the remote system is enforcing some security or access policy, or you're connection closed missing a file (such as the /usr/sbin/in.telnetd program). I'd look at the /etc/hosts.allow and /etc/hosts.deny files. I'd also look at the /etc/inetd.conf file. In /etc/hosts.allow and hosts.deny there might be a set of rules specifying a list of services (such as in.telnetd). Each of these services can be associated with a list of host/domain and network address connection closed by patterns. Entries in the hosts.allow are allowed to access the specified services while entries in the hosts.deny are disconnected (as you described). All attempts to access any service are logged. There are two groups of network services for which access can be controlled through these two hosts files: those that are dynamically launched through the 'inetd' dispatcher (any lines that refer to /usr/sbin/tcpd), and any "standalone" services which are linked to the "libwrap" libraries (such as the portmapper daemon that's shipped with most Linux distributions). At a guess I'd say that your problem is not related to entries in /etc/hosts.allow and /etc/hosts.deny. Most Linux distributions ship with those as empty files; they're just placeholders with comments. It's more likely that you're actually missing your /usr/sbin/in.telnetd. This should show up in your logs as a message like: "unable to execute" If that's the case: mount up your CD (on the server), change to the RPMS directory and type a command like:
rpm -Uvh telnet*.rpm... that should insta
netizen_69 New Member Hi there, I'm new to this. I'm trying to learn to setup a Linux E-mail server. Printed out the "The Perfect Setup - Fedora Core 5 (64 Bit)" I faced the foolowing message when I tried to telnet to see if SMTP-AUTH and TLS work properly. Quote [[emailprotected] ~]# telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is '^]'. Connection closed by foreign host. Unquote my main.cf Quote queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix mail_owner = postfix inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost unknown_local_recipient_reject_code = 550 alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases debug_peer_level = 2 debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin xxgdb $daemon_directory/$process_name $process_id & sleep 5 sendmail_path = /usr/sbin/sendmail.postfix newaliases_path = /usr/bin/newaliases.postfix mailq_path = /usr/bin/mailq.postfix setgid_group = postdrop html_directory = no manpage_directory = /usr/share/man sample_directory = /usr/share/doc/postfix-2.2.8/samples readme_directory = /usr/share/doc/postfix-2.2.8/README_FILES smtpd_sasl_local_domain = smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination smtpd_tls_auth_only = no smtp_use_tls = yes smtpd_use_tls = yes smtp_tls_note_starttls_offer = yes smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom Unquote Kindly advice what otherinformation you need and what went wrong? Thank you for your assistance. netizen_69, Oct 31, 2006 #1 falko Super Moderator ISPConfig Developer Are there any errors in /var/log/maillog? What's the output of Code: netstat -tap ? What happens when you run Code: /etc/init.d/postfix restart ? falko, Nov 1, 2006 #2 netizen_69 New Member vim /var/log/maillog Nov 6 04:02:08 svr1 postfix/pickup[18148]: 211721E3431: uid=0 from=