analysis tool for statistics about active connections, open sockets, routing tables; in general the networking subsystem.

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3
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0answers
26 views

chromium browser (pepperflashplugin) opening listening ports on 0.0.0.0:5353

I am using chromium browser (chrome) with pepperflashplugin in Debian. I have noticed, chromium/pepperflashplugin opens a listening port on my public interface 0.0.0.0:5353 as seen with netstat: ...
3
votes
1answer
30 views

log PID of each connection attempt

Finding the PID of an established connection is trivial using netstat or lsof. However, I have a process which is creating a connection ever 60 seconds to our database and locking it up by maxing out ...
3
votes
1answer
1k 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 ...
2
votes
1answer
22 views

How to report receive queue size for AF_UNIX sockets

netstat -a reports Recv-Q (amount of unread data pending for a reading application) for AF_INET sockets, but not AF_UNIX sockets (at least not for SOCK_DGRAM). Does anybody know a way to obtain this ...
1
vote
1answer
50 views

ss is replacing netstat, how can I get it to list ports similarly to what I am used to?

I've been trying to modernise my way with Linux by, for one thing, ditching netstat for ss. I looked up my favourite command line flag for netstat in the ss man pages, and was very glad to find that ...
1
vote
0answers
24 views

How can I log outgoing TCP traffic including the full path of URLs?

I use a program regularly on Linux that makes a TCP request when it starts up and updates a file with an access token before launching. I'd like to write a batch script that makes this request (using ...
1
vote
1answer
131 views

How to do a netstat that will only filter based on pid

How can I have the following command below just show/filter based on the PID's I'm looking for? sudo netstat -lp --inet The results come back as this Proto Recv-Q Send-Q Local Address ...
0
votes
0answers
43 views

Why doesn't syslog traffic show up in netstat and lsof output?

I've noticed on my CentOS 5.x system that outbound syslog traffic (UDP) doesn't show up in lsof or netstat results. I've even tried stuff like watch -n .1 'netstat -l -u -n --program' to make sure ...
1
vote
3answers
78 views

Status of network ports

I hope it is possible to get the necessary details of each network port from /etc/services. If I have to develop a C++ program to get the status of each port how should I start it? I am not allowed ...
0
votes
0answers
30 views

xfrm and xfrm gc stats

Are there any stats related to the XFRM and XFRM garbage collector? I am unfortunately running on a ubuntu 10.04 and cannot upgrade. /proc/net/xfrm_stat is not available. I am chasing some ipsec ...
1
vote
1answer
2k views

netstat shows an ESTABLISHED connection with no process

I am debugging some problems with postfix. When I establish a connection nothing happens and netstat shows: $ netstat -anp ... tcp 0 0 129.132.202.106:25 129.132.179.232:60154 ...
3
votes
1answer
117 views

Tons of unknown connections in nethogs

I am seeing hundreds of different connections to the same ip and port scrolling by when running nethogs. Occasionally the foreign IP and port will change (not always 80, but sometimes). I've noticed ...
3
votes
1answer
132 views

How does netstat command fit in various layers of TCP/IP model in the performance diagram?

netstat command is useful to, Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. Now, I was reading about the Linux performance ...
2
votes
0answers
59 views

How do I find out how long a socket is in CLOSE_WAIT?

I have a server relatively with a high number of sockets in CLOSE_WAIT I want to know the age of each socket, to know if it's a real problem (sockets not getting closed) or that the sockets are ...
0
votes
0answers
14 views

Detailed protocol statistics with ss?

What replaces netstat -es? ss -s doesn't provide nearly enough protocol level statistics.
2
votes
2answers
1k views

netstat — why are IPv4 daemons listening to ports listed only in -A inet6?

I have a computer with: Linux superhost 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux It runs Apache on port 80 on all interfaces, and it does not show up in netstat -planA inet, ...
-1
votes
1answer
114 views

how to close ports with no process attachedto it

how do you close ports if there are not processes attached to it? I used to run an application and they're using this ports previously for some reason the application crashed but if i restart the ...
4
votes
3answers
496 views

Command similar to netstat -np but grouped by state and PID?

Is there a command similar to netstat -np but grouped by state and PID? I'd like to know the current count of server connections in a particular state grouped by Programs. similar to, 102 squid ...
0
votes
3answers
102 views

Connectivity between 2 remote Linux machines

I have two remote machines, I'm running a script on one of them. There's some part of the script that should be running on the other one, then the script will continue in its further tasks/commands. ...
0
votes
0answers
47 views

Why SAMP is not listening to the port

I have forwarded 38474 port to internal port 7778. Then I launched San Andreas Multiplayer on my CentOS server. When I'm typing netstat -npl I see this: Proto: tcp Recv-Q: 0 Send-Q: 0 Local Address: ...
0
votes
0answers
452 views

port being in use not displayed in netstat output

In what scenarios port being used by a process don't show up in netstat -a output. I'm running jenkins on my machine. It's listening on port 8080. I'm trying to start another process that tries to ...
0
votes
1answer
68 views

Why is my Netstat not returning the desired output and just getting hung up?

My remote Linux machine is able to ping an IP address on an internet, but the same is unable to get the netstat report for that IP, please help through. ping a.b.c.d 64 bytes from a.b.c.d: icmp_seq=1 ...
5
votes
5answers
3k views

meaning of Netstat local address column

Local address on netstat output: When I do netstat -ntlp there is a column called Local Address: sometimes it would output IP address as 0.0.0.0:7180 and sometimes 127.0.0.1:9001 What's the ...
1
vote
2answers
788 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
131 views

what is 'smakynet' in the netstat result?

after logging into a server, I used netstat to check out the ports of this server and wanted to find which port was communicating with me My IP is 143.248.143.198 and my search results are like ...
2
votes
1answer
116 views

Why is the 'foreign address' not IP address but something like this?

I never learned network programming and this kind of stuff properly. Only know very basic stuff like IP address and just a vague concept of what ports and TCP/IP are. Here, I connected to my lab's ...
10
votes
4answers
7k 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 ...
5
votes
3answers
1k 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 ...
3
votes
2answers
2k views

Why does SSH show protocol as tcp6 *and* tcp in netstat?

$ netstat -nat Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:80 ...
0
votes
2answers
2k 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 ...
2
votes
3answers
5k 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? ...
1
vote
1answer
866 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
167 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
171 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 ...
2
votes
2answers
162 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 ...
1
vote
0answers
133 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 ...
0
votes
2answers
266 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. ...
7
votes
4answers
11k 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
1answer
757 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 ...
2
votes
2answers
3k 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 ...
4
votes
2answers
20k 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 ...
2
votes
2answers
87 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 ...
2
votes
2answers
3k 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
908 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 ...
2
votes
1answer
782 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 ...
10
votes
5answers
8k 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 ...
7
votes
4answers
31k 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 ...
9
votes
4answers
13k 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 ...
4
votes
4answers
7k 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
714 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. ...