Nc Write Error Connection Refused
Contents |
Routing, Routers, Network protocols in this UNIX and Linux forum. Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... linux operating commands and unix operating nc write error connection refused udp commands nc (netcat): Connection refused problem IP Networking Thread nc localhost connection refused Tools Search this Thread Display Modes #1 03-14-2012 dinga Registered User Join Date: Mar 2012 Last Activity: 14 netcat connection refused March 2012, 10:37 PM EDT Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts nc (netcat): Connection refused problem From my machine (ubuntu), I can do $ nc somemachine 80 But, when I want to connect to
Ncat Connection Refused Centos
other machine that runs nc on different ports, it throws "Connection refused" error. The same error occurs on my local machine. For example, [term 1] nc -l 5555 [term 2] nc x.x.x.x 5555 --> this throws "Connection refused" error (x.x.x.x is the ip number of the local machine) It works on my ubuntu virtual machine though. So, I wonder what makes to throw out "Connection refused" error on nc. Firewall? Network configuration? Anything else? How ncat connection refused centos 7 can I make it work? On the same machine or across the machine? Many thanks in advance. Remove advertisements Sponsored Links dinga View Public Profile Find all posts by dinga #2 03-14-2012 Corona688 Mead Rotor Join Date: Aug 2005 Last Activity: 20 October 2016, 11:16 AM EDT Location: Saskatchewan Posts: 21,559 Thanks: 999 Thanked 3,958 Times in 3,678 Posts The port option is -p, you are telling it to listen on the domain 5555 nc -p 5555 -l Remove advertisements Sponsored Links Corona688 View Public Profile Visit Corona688's homepage! Find all posts by Corona688 #3 03-14-2012 dinga Registered User Join Date: Mar 2012 Last Activity: 14 March 2012, 10:37 PM EDT Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Thanks. Remove advertisements Sponsored Links dinga View Public Profile Find all posts by dinga « Previous Thread | Next Thread » Thread Tools Show Printable Version Email this Page Subscribe to this Thread Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Search this Thread Advanced Search More UNIX and Linux Forum Topics You Might Find Helpful Thread Thread Starter Forum Replies Last Post sendmail problem, Connection refused by [127.0.0.1] orange47 Solaris 3 09-23-2011 12:25 PM The Connection was refused to www.sco.com hrmaldonado SCO 1 11-02-2010 09:35 PM Solaris 10 ftp connec
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us netcat invalid connection Learn more about Stack Overflow the company Business Learn more about hiring developers or
Cosbench Ncat Connection Refused
posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and
Linux Nc Examples
answer site for system and network administrators. Join them; 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 http://www.unix.com/ip-networking/178877-nc-netcat-connection-refused-problem.html and rise to the top Netcat “Connection refused” on localhost up vote 1 down vote favorite 1 I am trying to get a value from a netcat connection started at a php file, but it dies with: localhost [127.0.0.1] 2000 (?) : Connection refused I don't know why, but it works well if I ssh it as apache user (www-data). This is what I've done: Start an endless http://serverfault.com/questions/75430/netcat-connection-refused-on-localhost loop serving a date with a little delay: $ (while true; do nc -l -p 2000 -c "sleep 5; date"; done)& Check if is working: $ su www-data $ nc localhost 2000 Fri Oct 16 21:33:20 COT 2009 Create /var/www/test.php as follows: >/var/www/dates.txt 2>>/var/www/errors.txt &'); ?> Run it on a browser: http://myserver.com/test.php Finally take a look at both txt's, dates is empty (nothing like the response in #2) and errors has the "Connection refused" error. The server is a LAMP cluster running Ubuntu Server 9.04 with DRBD and Heartbeat. What is driving me crazy is that this test.php works well in my laptop (LAMP on Ubuntu Desktop 9.04) and the server seems to have the ports already open and listening: $ netstat -ntpl Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:4743 0.0.0.0:* LISTEN 2326/openhpid tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 3364/mysqld tcp 0 0 0.0.0.0:2000 0.0.0.0:* LISTEN 9510/nc tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 3470/apache2 tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2320/sshd tcp 0 0 127.0.0.1:3551 0.0.0.0:* LISTEN 2354/apcupsd tcp6 0 0 :::22 :::* LISTEN 2320/sshd This is what I really want to archive: diagram (I don't have enogh points to inser
runs netcat, a simple Unix utility that reads and writes data across network connections, using the TCP or UDP protocol. It is designed to be a reliable "back-end" tool http://www.computerhope.com/unix/nc.htm that can be used directly or driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities. Common uses include: Simple TCP proxies Shell-script based HTTP clients and servers Network daemon testing A Socks or HTTP ProxyCommand for ssh nc syntax nc [-46bCDdhklnrStUuvZz] [-I length] connection refused [-i interval] [-O length] [-P proxy_username] [-p source_port] [-q seconds] [-s source] [-T toskeyword] [-V rtable] [-w timeout] [-X proxy_protocol] [-x proxy_address[:port]] [destination] [port] Options -4 Forces nc to use IPv4 addresses only. -6 Forces nc to use IPv6 addresses only. -b Allow broadcast. -C Send CRLF as line-ending. -D Enable debugging on the socket. -d Do not attempt to read from stdin. -h Prints out nc help. -I length Specifies the ncat connection refused size of the TCP receive buffer. -i interval Specifies a delay time interval between lines of text sent and received. Also causes a delay time between connections to multiple ports. -k Forces nc to stay listening for another connection after its current connection is completed. It is an error to use this option without the -l option. -l Used to specify that nc should listen for an incoming connection rather than initiate a connection to a remote host. It is an error to use this option in conjunction with the -p, -s, or -z options. Additionally, any timeouts specified with the -w option are ignored. -n Do not do any DNS or service lookups on any specified addresses, hostnames or ports. -O length Specifies the size of the TCP send buffer. -P proxy_username Specifies a username to present to a proxy server that requires authentication. If no username is specified then authentication will not be attempted. Proxy authentication is only supported for HTTP CONNECT proxies at present. -p source_port Specifies the source port nc should use, subject to privilege restrictions and availability. -q seconds after EOF on stdin, wait the specified number of seconds and then quit. If seconds is negative, wait forever. -r Specifies that source and/or destination ports should be ch