Problem: can't restart programs which use socket to communicate.
Symptom: Restart Listener dies "Address already in use".
Restart Caller dies "connection refused"
System: Ubuntu 10 (and 9)
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I want to create script wherein it will check the application if its running. The command that I'll be using to check the application is telnet (if you can recommend others, that's ok). I've an application and it is listening to port 1808. If I do telnet localhost 1808, the response is :
Code:
[root@test ~]# telnet localhost 1808
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
What I want to happen is if the response is like to code above, it will execute a commands. Obviously, above code knows that the application is not working so I need to execute a commands. I created a script before using expect but I don't think it will work because I haven't establish a shell yet unlike successful telnet I could spawn expect.
I'm trying to make an SSH script for my place of employment. This script, I want to go out to the server hostnames we have specified (in another file) and change a users account password. We use Kerberized telnet, so if telnet root hostname fails, I want it to use ssh username hostname and use the old password (specified). If both fail, I want it to ask the user what the port should be and input the port in the ssh command.
But I'm having a issue having it try telnet root hostname and if it fails then, try to ssh in, I have no clue how to have it proceed. Is it an if statement? Here's the telnet failed message: telnet: Unable to connect to remote host: Connection refused
My wife takes her laptop on her travels but recently has been getting a connection refused when attempting to connect to our home server. The only reason I believe this is occurring is because of iptables blocking certain IP addresses which I don't want to delete for SPAM prevention.
What configuration what be both secure and relatively straight forward. Initially configured mac filtering but then realised this would not be appropriate under these circumstances..
Also there is no specific logging in either postfix or dovecot about connection refused.
I am facing an error when I run the following command telnet localhost 7777
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
I reinstalled unbuntu server recently and i am trying to get it to only allow one computer to accsess it. So after doing this etc/ssh/ sudo nano sshd_config I uncomment #ListenAddress 0.0.0.0 Ok so i am trying to accsess my server from a windows machine so i tpyed ipconfig /all to find my ip I found the IPV4 address and i put that address like so ListenAddress 192.168.1.22 But when i try and connect it says connection refused.
View 6 Replies View RelatedI'm trying to run Interhack (spoiled variant of Nethack) for local game. Is looking through settings I saw that:
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When I try to start it with ih_server option it gives me that error: Code: Can't access() script Could not create socket: Connection refused I think my problem is closed port: Code: nc localhost 9999 localhost [127.0.0.1] 9999 (?) : Connection refused How do I fix this?
I want to get the connected client MAC Address after accept() call. I can get the IP address of the client but i don't know how to get the client MAC Address in my this programme. Here I am Posting my Code.
#include<stdio.h>
#include<sys/socket.h>
#include<sys/types.h>
[code]....
I have written one simple code which is posted here. i want to fetch the Mac Address on socket descriptor which is returned after accept () call.
Code:-
#include<stdio.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<netinet/in.h>
[code].....
I am learning network prgramming in linux in c,and try to build a server and in this server I want to bind the listening socket to a paricular Ip address and port.Bind function is showing error,I did not want to use wild card. Here is the code.
#include<stdio.h>
#include<sys/socket.h>
#include<strings.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<string.h>
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I have a server listening on incoming client connections. Once the client establishes SSL connection with the server, the server waits on read() from the client. Only Client can disconnect the connection. I want to have a timer in the server program to wait for x secs after read() and then disconnect the Client connection.
View 3 Replies View RelatedI wrote a simple client server socket program in C.
View 1 Replies View RelatedI want to configure socket timer to release socket(port) once the connection is terminated. Do we have something in Linux OS to configure this delay to release socket?.
Any command, link or man-page anything will be helpful.
I browsed a lot but unable to find it.
Anyone knows the difference between a socket and TCP connection for connecting to an external system?
View 1 Replies View RelatedI'm writing a shell script that does multiple scp's and ssh'es to the same host. I would like to know if there is a way to write the script such that in the beginning an ssh connection is established. Then scp transfers files over the already open ssh connection. After which, terminal commands are executed on the host. A final scp transfers files again over the ssh connection. Then the ssh connection is terminated.The whole point is *not* to have:
#!/bin/sh
scp the_file host
ssh host 'execute-some-command.sh'
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iam just trying to connect to server which accepts one client and server will read(blocking operation) infinitely, but After closing the client socket the server "read operation" is returning zero and "errno variable(in errno.h)" value is also zero. how can i detect whether a client socket is closed/active..?
client.c
Serv_Addr.sin_family = AF_INET;
Serv_Addr.sin_addr.s_addr = inet_addr("127.0.0.1");
Serv_Addr.sin_port = htons(26553);
if( 0 > connect (Serv_Fds,&Serv_Addr,sizeof(Serv_Addr)) )
{
perror("connect");
return 0;
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I have a problem with vsftpd (latest version available, 2.1.0pre3) SSL. I've configured it to a nonstandard port, 65440, disabled connect_from_port_20 and run it as a normal user, from home directory. I can't use the SSL feature, every time I connect, it only reaches the login process. After logging in, I get the following error (when data transfer would start for LIST command):
522 SSL connection failed; session reuse required
My vsftpd.conf looks like this
Code:
local_enable=NO
write_enable=YES
secure_email_list_enable=YES
email_password_file=/home/stringz/vsftpd/logins
# local_umask=022
dirmessage_enable=NO
vsftpd_log_file=/dev/null
xferlog_file=/dev/null
xferlog_enable=NO
connect_from_port_20=NO
idle_session_timeout=3600
data_connection_timeout=120
run_as_launching_user=YES
anonymous_enable=YES
anon_mkdir_write_enable=YES
anon_other_write_enable=YES
anon_upload_enable=YES
anon_world_readable_only=NO
async_abor_enable=YES
ascii_upload_enable=YES
ascii_download_enable=YES
ftpd_banner=Welcome!
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
# chroot_list_enable=YES
# (default follows)
# chroot_list_file=/etc/vsftpd.chroot_list
ls_recurse_enable=NO
listen=YES
listen_address=<myipaddress>
listen_port=65440
listen_ipv6=NO
pasv_enable=YES
pasv_min_port=65441
pasv_max_port=65480
# chroot_local_user=YES
ssl_enable=YES
allow_anon_ssl=YES
force_local_data_ssl=NO
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
rsa_cert_file=/home/stringz/vsftpd/vsftpd.pem
The client side is a Total Commander 7.02, there hasn't been any problem with its SSL yet and this only occurs when trying to connect to my vsftpd.
I am pragmatically trying to upload a list of files from my client machine to a proFTPd server I have running on Ubuntu. Every time I get several (around fifty) files into the transfer, I get the following error: Quote: Connection reset by peer: socket write error
I am able to remotely upload 25,000 small files of ~ 1K in size, but when I go to upload hundreds of 2-4 Mb files, I get a socket write error. Am I using up all available sockets before they can be released? If so, how do I release the sockets? If not, what does this error mean and why am I getting it?
i'm writing a simple program of client socket program. Here below is the code sample which i'm writing...
Code:
//tcp_client.c
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include<string.h>
#include<stdlib.h>
[Code].....
the above code works fine.if we copmile and run ./a.exe 192.xx.xx.xxx 1111 and press enter it works fine..everytime it asks "Please enter the message: " and if give that will be displayed in server. but my problem is i dont want to print everytime "Please enter the message: " i just want to feed some words one by one to the socket.
im getting that error in my code for some reason. I compiled my code, and when i try to run this server it throws me an error on my call to setsocketopt(). The only way it can reach that part of my loop is if it succeeds when it calls sock() so I dont understand why the error says its an operation on a non-socket. Im just trying to set up a server to pass messages from a client to it a viceversa. Here is the code:
Code:
int main()
{
int socket_fd, new_socket_fd, k;
struct addrinfo hints, *server_info, *p;
struct sockaddr_storage peer_address;
code....
I tried to finally set-up surround sound on my Ubuntu 10.04 machine and i was successful in doing so after a while of changing settings and tinkering. After doing so though, i was later in the day not able to get into the Pulseaudio Volume Control, therefore, everything is stuck where it is and i can't change anything. When i try to open Pulseaudio Volume Control i get the error message, Connection failed, Connection refused. My programs still play sound and i can control the sound of the programs through the programs, but i cant control the sound of the sorround sound now and my main sound bar only affects my stereo speakers, not the surround ones.
I believe this may have happened after the random disk check on restart, but i can't 100% confirm that and i'm not even sure if they are related. I still have sound, but i have no way to control the volume of my entire system at once. I did some looking around online and saw that others are having or had the same issue, and it was through different versions of Linux also. somehow reset everything so i can access PAVC and start over . I also tried steps listed in another thread here on the same topic, but they weren't working and it also seemed to be for older Ubuntu versions.
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I'm trying to create a PAN (Personal Area Network) using a laptop (Siragon ML-1040) and my desktop computer, but I get the Connection Refused (111) error.
Blueman doesn't detect any network service between the two computers unless I start PAND on one of them and then it detects the NAP service. That, only after I enable the NAP/Workgroup services on the Services submenu in Blueman. However, it doesn't work neither with the NM plugins or without them (dhclient and that other one I can't remember the name of).
Any clues over here? I'm using pand 4.91 and blueman.
vsftpd not working on my CentOS system. I tried logging in using FileZilla but the error message was: Connection attempt failed with "ECONNREFUSED - Connection refused by server".
View 7 Replies View RelatedI am currently trying to get a B.A.T.M.A.N mesh network up and running. the thing uses UDP port 4305 for broadcasting to nearby nodes and it seems this port is closed or used by something else.
now i have tried to open this port with commands like
Code:
iptables -A INPUT -p udp --dport 4305 -j ACCEPT
iptables -A OUTPUT -p udp --dport 4305 -j ACCEPT
it still gives me the same error saying the socket cannot connect.any way for me to scan that udp port, see what is blocking it and open the thing up ?
This message appears very often in teh output of very different programs, for example Firefox/Swiftfox, Thunderbird, Mplayer In case of Mozilla apps it sometimes freezes KDE interface too (can't switch windows or panel does not pop-up) for a few seconds. IPV6 is not compiled into kernel and module is not built. It is disabled on the eth0 interface too.
View 1 Replies View RelatedI can't seem to get on my Twinkle SIP Phone, it says: "Failed to create a UDP Socket (SIP) on port 5060 Address already in use" after that message it brings me back to the window were I'm supposed to run my profile, how do I fix this?
View 6 Replies View RelatedI finally got the certs to configure:
openvpn --config server.conf
Tue May 3 17:26:27 2011 OpenVPN 2.1.1 i686-redhat-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Jan 5 2010
Tue May 3 17:26:27 2011 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Tue May 3 17:26:27 2011 Diffie-Hellman initialized with 1024 bit key
Tue May 3 17:26:27 2011 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
Tue May 3 17:26:27 2011 ROUTE default_gateway=192.168.122.1
Tue May 3 17:26:27 2011 TUN/TAP device tun0 opened
Tue May 3 17:26:27 2011 TUN/TAP TX queue length set to 100
Tue May 3 17:26:27 2011 /sbin/ip link set dev tun0 up mtu 1500
Tue May 3 17:26:27 2011 /sbin/ip addr add dev tun0 local 10.8.0.1 peer 10.8.0.2
Tue May 3 17:26:27 2011 /sbin/ip route add 10.8.0.0/24 via 10.8.0.2
Tue May 3 17:26:27 2011 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ]
Tue May 3 17:26:27 2011 Socket Buffers: R=[114688->131072] S=[114688->131072]
Tue May 3 17:26:27 2011 UDPv4 link local (bound): [undef]:1194
Tue May 3 17:26:27 2011 UDPv4 link remote: [undef]
Tue May 3 17:26:27 2011 MULTI: multi_init called, r=256 v=256
Tue May 3 17:26:27 2011 IFCONFIG POOL: base=10.8.0.4 size=62
Tue May 3 17:26:27 2011 IFCONFIG POOL LIST
Tue May 3 17:26:27 2011 Initialization Sequence Completed
But openvpn still won't start; where to go from here.
Tue May 3 17:54:25 2011 TCP/UDP: Socket bind failed on local address 192.168.122.3:1194: Address already in use
Tue May 3 17:54:25 2011 Exiting
i m using RHEL5 on my server machine and open suse 10 on my client machine.both system ping each other, firewall is off of my server machine,i put a file from my client to my server machine using scp command but ftp command is not working when i want to open connection i receive a message "connection refused".what can be the issue?
View 5 Replies View RelatedRegarding fedora12. how to set up the port 8080 and or tell me why I cannot connect to localhost 127.0.0.1?
I tried to add port 8080 to firewall under other ports, but still doesn't work.
I have an old PC with two hard drives (40 and 60Gb) and it uses dual IGhz pIII processors. It shares screen,mouse and keyboard with another PC.Both into Netgear modem. It ran ubuntu 8.04 and XP Pro on the drives above with no problems. Then I decided to try Mint 11 (34bit CD) - result after Grub blank screen other than flashing cursor at top left.No input from keyboard.
Tried Mint KDE 10 (34bit DVD) same result.
Tried Kubuntu 10 (CD) same result.
Reinstalled Ubuntu 8.04 no problem.
Upgraded via download from 8.04 to 10LTS hoping that this would somehow prevent the problem and have screen which says:-
starting up
[000000] ACPI no DMI BIOS year,ACPI =force is required to enable acpi
mount: mounting none on /dev failed: No such device
udevd[825]: error getting socket: Invalid argument
error initialising netlink socket
udevd[825] error initialising netlink socket
libudev: udev_monitor_new_from_netlink:error getting socket:Invalid argument
Segmentation fault
Gave up waiting for root device.Common problems:
Boot args (cat/proc/cmmdline)
Check root delay (Did the system wait long enough)
Check root (did the sytem wait for the right device)
Missing modules (cat/proc/modules; 1s /dev)
ALERT! dev/disc/by-uuid/"long number here" does not exist.Dropping to a shell.
Then it goes into Busybox and ends with "initramfs". I have tried altering the boot device in BIOS from HDD0 through 3 with the same result other than more bad language!