I get this message when I try to start my Apache httpd server :
Code:
[root@user ~]# /etc/init.d/httpd start
Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:8091 [OK]
So I tried to identify the user of port 8091 :
Code:
sudo netstat -nap | grep 8091
sudo lsof -i:8091
But it seems that nothing is using port 8091! I'm running on Fedora 13 and I cannot use an other port for my server.
$ uptime
09:55:00 up 7 days, 6 min, 2 users, load average: 0.00, 0.00, 0.00
..but I'm the only user logged in!
$ who -a
system boot 2010-09-06 09:48
run-level 2 2010-09-06 09:48 last=
[code]....
looks as though this is the culprit, but...
$ kill 5485
-bash: kill: (5485) - No such process
This process doesn't exist in the /proc folder or the output of ps. Does anyone know how this happened, and how to remove this ghost user from my system without a complete reboot? I think I have seen a similar thing on a RedHat machine ages ago but I have never figured out how to log out these ghost users.
$ uname -a
Linux ubuntu 2.6.24-28-server #1 SMP Wed Aug 25 16:07:16 UTC 2010 i686 GNU/Linux
Currently my OS is Ubuntu 9.04 Jaunty Jackalope Desktop OS and my web server is Apache2. I have a public address 60.x.y.z and my pc local address is 10.x.y.z. I have a web app in my Apache2 which currently run in localhost(10.x.y.z).
I would like to enable the web app so that it could be browse from outside. I know there maybe some port forwarding process and some commands involved in order to do that. But I have no idea on the steps to do that.
I want to pass ip address,port address and some parameters from command line using python script.The ip address and port address for establishing socket connection and remaining parameters to execute different connection.
View 1 Replies View RelatedI'm using a Debian servers, as router/firwall.. I've two ethernet interfaces into the server, one for wan and one for lan. The i use SNAT so my LAN clients can access the internet throgh the debian router. That is working... Now i want to be able to access servers on the LAN site from the WAN site, and i wanna use port address translation (PAT). I have a FTP server running on a lan server, so i'm trying to portward port 21.
iptables -t nat -A PREROUTING -p tcp -i eth1 -d (WANIP) --dport 21 -j DNAT --to 192.168.1.2:21
When people try to access my FTP from the WAN site, they are redirected to the local FTP server, and they are promted for crendentials, but when the credentials are typed, and the local ftp server should answer the wan request, the connections dies.
The wan clients are being promted for credentials, so they are redirected to the local lan server, but after that the connections dies, so i think there is some kind of nat problem, when the local lan server is trying to respond to the wan request..
Here i my iptables script:
#flush table
iptables -F
#input regler
[code]....
I make an application on GNU/Linux which listening on a MULTICAST stream, so I open my unconnected socket, bind it on a MULTICAST address and a port, join the multicast group with the "setsockopt (IP_ADD_MEMBERSHIP)", then I receive datagram on my socket.
Now I've two different instances of the same application that run with their own MULTICAST address and port. And what I found strange is that, after a misconfiguration, I switch the ports, for example:
Emitting on 225.0.0.1/23451 and 225.0.0.2/23452
Receiving on 225.0.0.1/23452 and 225.0.0.2/23451
And my receiving part doesn't care about the MULTICAST address, it looks like the socket is listening on the port number only! I mean that the receiver [225.0.0.1/23452] take its datagrams from emitter [225.0.0.2/23452] and vice-versa!
I need to know what the Iptables "code" is to change the outgoing/Incoming IP for port 53 (DNS). I'm running CentOS on a dedicated server. I very familiar with Putty and SSH. So I don't need much details, I just can't figure this out. I asked my server providor but they deleted my ticket and didn't answer me.I tried this but am not sure if this correct of working?
View 5 Replies View RelatedI want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
I had a simple cron shell script running under Fedora 14. It runs under a user account. The shell script invoked a PHP script to do some simple batch database updates. If a step failed, the PHP script used the mail command to email me of the failure.
The problem is that an email from this job is arriving every day at 4:30 am. I deleted the job from the cron. I even renamed the shell script to make sure! The email is an old one and is stuck somewhere and I don't know where. I restarted the sendmail service and that did not clear it. I don't even know why it happens at 4:30am! At one time the cron ran it at 4:30 but now its not even in cron! And as I said, I renamed the shell script to make sure.
I am trying to use the printer port. But, I get this
Code:
Broadcom EJTAG Debrick Utility v1.6r-hugebird
Failed to lock /dev/parport0: No such device or address
johnh@tux:~/Ubuntu One/hh$
run from johnh I permission denied sudo-ing I get above.
I'm trying to grok a problem I'm having with an embedded machine. I'm pretty sure I can track down the larger problem, but I came across a usage of ifconfig that I don't understand, and I'm pretty sure this is the command that is failing.
The command is: ifconfig eth0 192.168.78.20:9134
I understand how ifconfig works. What I don't understand is the :9134. I can't see anything in the docs about what this means. I know in most contexts it's a port number, but what does it do when bringing up a network interface? Does it limit it to only using port 9134?
Is it possible to forward a connection to a port to a completely unrelated external address? For example, I want to redirect ssh traffic to a.b.c.d to w.x.y.z. If w.x.y.z were an internal address and the machine was the router, this would just be plain old NAT port forwarding. But what if w.x.y.z is not an internal address? The reason I want to do this is I want to reassign a domain name example.com from ip address A to B, while allowing users to still ssh into A by using the [URL] domain name. Is this unreasonable? (I am guessing it is unreasonable, since the A wouldn't have it's gateway set to B, as is the case if A were in B's NAT'd internal network.)
View 2 Replies View Related- I setup port forwarding of openssh :
connect 1: ssh -g -f -p 11111 -i /<path-to-private-key> user1@ip-server1 -L 22222:ip-server1:161
- Then I setup second connection
connect 2: ssh -g -f -p 11111 -i /<path-to-private-key> user1@ip-server1 -L 22223:ip-server1:3306
- Openssh waring to me "bind: address already in use"
- So I think port 22223 have had another program use,I use command:
ps aux | grep ssh /* find process id of second connection */
kill -9 <process-id-second-connection>
netstat -an | grep 22223 /*find which program use port 22223> */
- but I can't find anywhat
- Then I run again command :
connect 2: ssh -g -f -p 11111 -i /<path-to-private-key> user1@ip-server1 -L 22223:ip-server1:3306
- And I receive a error from OpenSSH :" bind: address already in use"
How to find the Address which is already in 2632 port?
View 1 Replies View RelatedI have noticed that on my laptop, when I check for available networks; I get this [picture attached]. However all those networks are non existent at that time when I scan for networks with my desktop PC (which is right next to the laptop). How can I stop these phantom networks from appearing? Note: One of those networks is mine. Even when I have my router switched off, my laptop (running Linux Mint) still says it is available.
View 1 Replies View RelatedServer with 4 disk partitions in an RAID 5 array using md. Yesterday the array failed with two devices showing as faulty. After rebooting from rescue, I was able to force the assembly and start the array and everything looks to be okay as far as the data goes, but when I run:
Code:
mdadm --examine /dev/sda3
I get (truncating to the interesting bits):
Code:
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 1448195216 (690.55 GiB 741.48 GB)
Array Size : 4344585216 (2071.66 GiB 2224.43 GB)
Used Dev Size : 1448195072 (690.55 GiB 741.48 GB)
Array Slot : 0 (0, 1, 2, failed, 3)
Array State : Uuuu 1 failed
And
Code:
mdadm --detail /dev/md1
yields:
Code:
Array Size : 2172292608 (2071.66 GiB 2224.43 GB)
Used Dev Size : 1448195072 (1381.11 GiB 1482.95 GB)
Raid Devices : 4
Total Devices : 4
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Additionally, the 'slot' for devices a-d line up like this:
a - 0
b - 1
c - 2
d - 4 (!)
The first number 'Array Size' from examine is twice as big as sit should be based on the output from detail and comparing to twinned server, and why does the 'Array State' and 'Array Slot' from examine indicate there's a 5th device that's not indicated anywhere else?
I 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 am trying to list all traffic from 1 IP address but filter out port 1057.I keep getting syntax errors. I've tried:
Code:
ngrep -e host xx.xx.xxx.170 not port 1057
ngrep -e port 1057 -x host xx.xx.xxx.170
ngrep -e not port 1057 -x host xx.xx.xxx.170
etc.
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>
[Code]...
Originaly I had Win7 and Ubuntu (Ub) set up OK in dual boot. The Ub was on a seperate drive in its own partition - then the darn drive failed. Without reinstalling Uu I still get it as an option in the dual boot menu. If I do reinstall Ub I end up with a 2nd Ub option. How can I get the boot menu to show Win7 only, so that I can re-install Ub with only 1 entry in the boot table?
I have tried using bootrec.exe from the command line in Win7 recovery mode but that does not fix things.
I'm trying to add a key public key for my dev box which is a vm running ubuntu natty, and I am unable to connect via ssh. I've tried rsa and dsa, as well as these commands:
exec ssh-agent bash
ssh-add ~/.ssh/id_rsa
ssh-add ~/.ssh/id_dsa
[Code]...
I think I've found the error by running sudo /usr/sbin/sshd -Dd, but I'm not sure how to fix it:
ebug1: sshd version OpenSSH_5.8p1 Debian-1ubuntu3
debug1: read PEM private key done: type RSA
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
[Code]...
My college providers shifted to a different setting.. I'm not sure what needs to be done. On windows, under the connections tab you need to change the proxy settings and put in the IP address and enter the port to 3000. Questions:
1. where lies the linux (ubuntu 10.04) variant to execute the operation.
2. What can be the major obligations of such a change?
I am sure its siimple enough, but I can't get my net to work properly. The connection provided to the internet is through wireless routers.
i am running ncat (netcat's new version from nmap) on centos . I am listening on different ports. My question is , is it possible that when a connection is received on a port say 123, i redirect this connection to a different port and use the 123 port again for listening connections. ncat has an option -k which u can add with -l , it will force fully listen on the port. It can accept multiple connections on a single port but i want that once a client connects on to 123 port, he is forwarded to some other port and no longer on 123.
View 4 Replies View RelatedI want to run a soft that is daemonized, and listens on port 6789. This soft is launched through a php page, so, by the apache user. The probl�me is that the apache user does not has rights to open / listen on a port. I tried to add apache user to the root group, but it won't help. In the application log, I have this every second :
[code]...
I tried to add apache user in the sudoers with a nopasswd but it's still a no go.
I running Squid 2.7. I using NCSA veryfication so only registered users may use proxy server. I want to allow only 1 connection to proxy for 1 user. Why not per ip ? Alot of users have dynamic IP's and i want to avoid password sharing beetween users. Any idea how to do it in squid ? Mb other autentyfication system connected to squid granting access to proxy server ?
View 3 Replies View RelatedIm writing up a script to set up ufw with ssh on a user defined port. I have 2 minor issues, 1, this script can only run once, from the defualt configuration files. if the config files are previously modified, this script will fail. So how can i fix it so that the line specifying port in the ssh_config file can be read and rewriten to numerous times.
I have alot of echo type commands. how can I neaten that up?
Code:
#If these aren't installed, install them now with:
#sudo apt-get install openssh-server denyhosts ufw
#This script is to help you set up decent security
#on your Linux computers. Run this script as root.
[Code]....
I wish to intercept/forward emails that is sent to one user on multi user mail server.I only want email from one specific address or group,to be redirected and it will be redirected to another user on same server.The email should not arrive in original users inbox.".forward" file can not give me such solution,because ".forward" file will forward all mails to another specific mail id,which i don't want. I want only specific users mails onto another local user.Is this possible in sendmail?Anybody have clear idea of "virtusetable" & "aliases" file?
View 1 Replies View RelatedI am facing two issues with CUPS - 1. I have installed cups 1.3.9 over OpenSuse11 x86. Please check below -
cups:/usr/share/cups/banners # cups-config --version
1.3.9
cups:/usr/share/cups/banners # cat /proc/version
Linux version 2.6.27.7-9-pae (geeko@buildhost) (gcc version 4.3.2 [gcc-4_3-branch revision 141291] (SUSE Linux) ) #1 SMP 2008-12-04 18:10:04 +0100
I have added few printers over there and everything is working fine. I can also able to add - delete - modify any printers from "yast2 printer" command. I can also able to browse cups web interface via http://cups:631, but when I am going to manage the printers (start - stop - delete etc), none of the buttons are working in firefox5 not even in IE also. Older version of firefox is giving error as "This address uses a network port which is normally used for purposes other than Web browsing. Firefox has canceled the request for your protection." All other buttons are working properly.
2. LINUX - LINUX Printing - OK
LINUX - WINDOWS Printing - OK
WINDOWS - LINUX Printing - NOT OK
While giving printing from Windows machine (Printer attached on Linux), there is no problem to coonect the printers, but unable to print.
My understanding is SELinux adds type enforcement to standard Linux. This means that both the standard Linux and enhanced SELinux access controls must be satisfied to access an object. Which means that thing that is prevented to do in the normal standard Linux will be also prevented in the SELinux System? Does SELinux make it possible to run a non-root software to bind to a port < 1024? something that standard Linux won't allow? If not, what other suggestions do you have for allowing a program to run as non-root but able to bind to privileged ports? I know all about using the port re-direction such as ipchains, iptables.
View 4 Replies View RelatedI'm running an embedded Linux kernel, and I want to obtain a real memory address from user space. After goggeling a little, I found that the only way was to use mmap to access /dev/mem. But I never used mmap. I want to load a program in memory, in order to make it available from another processor, that has access to the DDR, but not to the flash memory where program is stored. Here is the code I use:
Code: // Open file and get its size
FILE* program = fopen(argv[3],"rb");
fseek(program, 0, SEEK_END);
long program_size = ftell(program);
fseek(program, 0, SEEK_SET);
// Prepare memory to copy it in
void* program_address = malloc(program_size+1);
FILE* memory_stream = fmemopen(program_real_address, program_size + 1, "wb");
[Code]....