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0
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2answers
67 views

How to determine eth0 gateway address when it is not the default gateway?

In my system I have eth0 (which may or may not be connected) and a modem on ppp0 (which always may be up or down). The the case where both interfaces are up and ppp0 is the default route, I'd like to ...
1
vote
3answers
67 views

tcp6 in the output netstat

What does column 'tcp6' mean on output netstat? Please anyone explain the follow output of netstat: tcp6 0 0 dmz.local.net:www 5.140.235.6%14631:49964 ESTABLISHED 21393/apache2 What does tcp6 mean? ...
0
votes
1answer
57 views

Iptables rule to allow only one port and block others

We have two apps running (on top of linux) and both communicates through port 42605. I wanted to quickly verify if this is the only port that's been used for communication between them. I tried below ...
0
votes
2answers
57 views

what process is listening on a given port

I have several problems: some process is attempting to send data and the firewall is rejecting it at the rate it is sending it out firewall logs flood the system (may need to rate-limit the logging) ...
4
votes
2answers
136 views

Find which ports a program access

I have a program that tries to connect to a server on start-up on a unknown port. I need to find out which port the program accesses to enable a ssh tunnel. I tried netstat but since the connection ...
0
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0answers
17 views

curl unable to find cslistener

netstat shows some connection from my linux box to remote host on their cslistener port. But trying to access that port using curl is giving error : $ curl -v https://myapp.domain.com:cslistener * ...
2
votes
2answers
47 views

netstat command doesnt work anymore on the new dedicated server

I was using the following command on my previous dedicated server with the same version of the FreeBSD installation: # uname -a FreeBSD 9.2-RELEASE FreeBSD 9.2-RELEASE #0 r255898: Thu Sep 26 22:50:31 ...
2
votes
1answer
210 views

Accounting for /proc/net/dev reported traffic

I noticed that according to /proc/net/dev I am constantly receiving around 6Kb/s on my wireless usb interface. But I can't account for anything even close to that with the individual connections that ...
0
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2answers
53 views

Where are netstat's -t and -u flags documented?

I use the following command to find open ports on my servers: $ netstat -ntulp I've probably found that on some random website over the years. However, I cannot find where -t or -u are documented. ...
2
votes
1answer
61 views

Understand netstat -i flgs

Can anyone explain for me what each option in Flg means? [root@apple ~]# netstat -i Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 ...
1
vote
2answers
366 views

What does 0.0.0.0:* mean in netstat?

Could anyone explain the following output of netstat -plunt? udp 0 0 0.0.0.0:58262 **0.0.0.0:*** 1163/avahi-daemon: udp 0 0 0.0.0.0:17500 ...
1
vote
0answers
66 views

Command for finding open ports

On my linux servers I have this alias set: alias ns="sudo lsof -Pi|grep -v ESTABL|grep -v CLOSED|grep -v -e '->' | tr -s ' ' '\t' | awk '{print $3 "\t" $8 "\t" $5 "\t" $9 "\t" $1}'| column ...
1
vote
2answers
195 views

Finding the PID of the process using a specific port?

I am installing hadoop on my Ubuntu system. When I start it, it reports that port 9000 is busy. I used netstat -nlp|grep 9000 to see if such a port exists and I got this: tcp 0 0 ...
0
votes
0answers
83 views

irc connection timeout problem

I am using tcpredir to connect to freenode server via port 6665 for some firewall difficulties: server:~# redir --lport=6665 --cport=6665 --caddr=irc.freenode.net and recently i faced a problem, i ...
2
votes
2answers
60 views

OS X: how to keep the computer from sleeping during a http connection

An application I use downloads data from a specific server, and I need it to sleep after the download has finished and the socket is closed. However downloads take place at random days, the app that ...
0
votes
2answers
249 views

How to use netstat command

My question is what does it mean to LISTEN or ACCEPT on a port as it relates to my example? Example: I have a tomcat server, and It will use port 8080. I want to make sure that port is available for ...
1
vote
2answers
527 views

Open a port in my CentOS

I'm trying top open a port on my CentOS machine: I edit the /etc/sysconfig/iptables file and add my rule: -A INPUT -p TCP -m state --state NEW -m tcp --dport 143 -j ACCEPT Then I restart the ...
0
votes
2answers
243 views

Why doesn't my client IP address appear in the netstat output?

My client is a MS Excel plug-in running on my laptop (client_machine1) that connects to a Solaris server (server1) to request some WebLogic Application running on port 28080. bash-3.2$ set | grep ...
1
vote
1answer
347 views

why ss(8) understands listening UDP ports differently than netstat(8)?

If I execute ss -lu in order to view all the listening UDP sockets, then none of the sockets are displayed. If I execute ss -au, which lists all(both listening and non-listening) UDP sockets, then ...
4
votes
4answers
6k views

How do I know what service is running on a particular port in linux?

I am trying to run weblogic server on my linux machine and I am getting the following error : ERROR: transport error 202: bind failed: Address already in use ERROR: JDWP Transport dt_socket failed to ...
4
votes
3answers
3k views

What's the easiest way to find an unused local port?

What's the easiest way to find an unused local port? Currently I'm using something similar to this: port=$RANDOM quit=0 while [ "$quit" -ne 1 ]; do netstat -a | grep $port >> /dev/null if ...
6
votes
4answers
5k views

How to check that a daemon is listening on what interface?

Ex.: an sshd is configured to only listen on wlan0. So. Besides checking the sshd_config how can I check that a daemon is listening on what inerface? netstat can do it? how? (OS: openwrt or scientific ...
2
votes
4answers
2k views

How to do an IF statement from the result of a executed command

I am trying to do an IF statement from the output of an executed commmand. Here is how I am trying to do it, but it doesn't work. Does anyone know the right way to do this? if [ "`netstat -lnp | ...
1
vote
1answer
490 views

Have netstat not display port numbers for foreign address

I would like to get netstat to not display port numbers on the foreign address so I can run some statistics on it. This is for a FreeBSD system. The following is a example of the output. ...
1
vote
1answer
505 views

Netstat shows programs running on different ports then they should

I have some code I'm testing. Program A listens on a predefined socket for program B to connect to and for my testing I'm running 32 instances of the programs A and B. I've written my script to tell ...
4
votes
3answers
524 views

How can I know the process name which is opening a tcp port?

I have two linux servers. Let's say they are C and S. C is client of S On my S machine, I type. $ netstat -an | grep ESTABLISHED tcp 0 0 192.168.1.220:3306 C:57010 ...
1
vote
0answers
157 views

Information about the 1630/master app

When I run $ sudo netstat -a --programs | grep LISTENING | grep 1630 I will get this output. Do you know what good are processes running under this app name? Why they I running on my system and if ...
1
vote
3answers
209 views

How can I identify processes that use network facilities, and can they be killed?

In the output of netstat -a | grep LISTEN there are usually a lot of processes. How (where) can I find out information about them, what is their purpose in the system and if I can kill them? Which ...
4
votes
3answers
3k views

How to list all unique ip address currently connected to a specific port?

Say I want to know how many unique clients are connected to port 5222 on a server. Can you find a way better/faster/stronger than this? netstat -nt | grep ':5222.*ESTABLISHED' | awk '{ print $5 }' \ ...
2
votes
2answers
559 views

Per Socket network Buffer queues utilization

Is there a way to get a per-socket send and receive Queues utilization on Solaris similar to the way that Linux' netstat displays it? Example on Linux: Proto Recv-Q Send-Q Local Address ...
6
votes
4answers
8k views

Logging outgoing connections as they happen

Is there a way to log to file all the outgoing connections that a process creates? I am aware of netstat but that seems to be more of a snapshot of a point in time rather than something that runs and ...
2
votes
3answers
364 views

VPN and gateway problems

I've got a corporate VPN, which I use to access the Internet. When it's on, I cannot reach the servers inside the corporate network anymore, so I think there are some problems with the gateway setup. ...
4
votes
3answers
3k views

Source code of netstat

Can I view the source code of netstat on my Linux machine?
10
votes
5answers
4k views

Under AIX, how can I get the full path of a program bound to a port?

Under Linux I can use netstat -tulpnw and ps, like so: # netstat -tulpnw | grep :53 tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 1482/named udp ...