Questions tagged [netstat]
netstat is a tool for viewing active network connections, listeners and sockets.
299
questions
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MAC OS routing: Default route used instead of correct interface
I have the following situation: I can't access host1 from host2:
Setup on host1 (Mac OS):
Interfaces:
vlan0: 10.10.240.12 (vlan tag 222)
en0: 134.100.202.12 (native)
Host2 (Debian Linux):
en0: 10....
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0answers
15 views
netstat output with both names and numbers
netstat that is used in modern Linux distributions has two modes of displaying addresses (as domain names and numeric addresses. Those two modes can also be selected separately for host addresses and ...
0
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1answer
120 views
Ngnix Closes The Connection Doesn't Return 301
struggling to get my hosts to work on port 80/HTTP and redirect to HTTPS. Discovered this when I gave out a URL and they said it didn't work but noticed a direct link to the site did work. I've done ...
0
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0answers
61 views
Why two TCP connections to mysql server?
When I connect to a mysql server via a client, it seems to create two new TCP connections each time, for example doing:
$ netstat -a |grep mysql
# tcp4 0 0 lmy.att.64710 ec2-54-00.mysql ...
0
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0answers
142 views
OpenVPN Access Server has a lot of listening ports
I have setup OpenVPN Access Server for a small private cloud network.
It works great, but I am wondering about all these 900 ports showing up in netstat from part of the system called openvpn-openss. ...
1
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0answers
59 views
Get information about socket of unknown domain
The output of lsof (revision: 4.87) on centos 7.8.2003 shows:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 30858 xxxx 841u sock 0,7 ...
0
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0answers
110 views
netstat shows a listening port with no pid and can't find pid with rpcinfo and ss and lsof
I tried bind nc on port 41120, but it said port has already been used. So I want to find out which process binded this port and if I can kill it. I executed netstat -taupen| grep 41120 and it shows ...
0
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2answers
51 views
Netstat port status
How can I see all ports and their status on my pc using netsat? (All 2^16 ports) And how can I list apps that have an open port in transport layer of my computer with application name and it's port? ...
0
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1answer
91 views
what are the options to close manual the port correctly or release the port on rhel machines?
we have redhat 7.5 server
we are suspect that port 50070 not closed correctly by the service , ( we check by netstat and PID not found ) but from the log we can see that port is in use
so we try to do ...
1
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1answer
88 views
SAMBA netstat local address 0.0.0.0
Trying to run samba AD DC but I'm stuck. After created domain provision, I defined resolv.conf:
cat /etc/resolv.conf
nameserver 10.99.0.30
search example.com
Service running:
samba-ad-dc.service - ...
0
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1answer
63 views
New and Unknown Netstat Entries
OS = Debian 10.
When I run netstat -natp, I have two unidentified entries which are concerning.
tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN 24310/redis-server
...
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66 views
What is the difference between interface discards and statistics packets discarded (windows netstat)?
On a windows server
Sent / Received -> Discards from
netstat -e
seem to present a different measure than Received Packets Discarded / Discarded Output Packets from
netstat -s
At the same ...
0
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0answers
36 views
Where are localhost /loopback stats counted (windows netstat)?
A server I use is recording a high number of received packet(s) discarded as visible in netstat -s.
The majority of the tcp communication on this box is effectively to/from localhost. Some apps ...
0
votes
1answer
49 views
Proxy service only responding on some IP addresses (others suck on SYN_RECV)
I have a server using a proxy service (WAF etc) which forwards packets to my server.
I can see established SSL conenctions from all proxy netstat -an and the rest stuck in SYN_RECV:
tcp 0 ...
3
votes
1answer
141 views
DDOS manual mitigation using command netstat. How to determine real attackers?
When my server is slow, I have been told to run this command and check if someone is making a request of SYN_RECV to slow down my server:
netstat -npt | grep SYN_RECV | awk '{print $5}' | grep -Eo '(...
0
votes
1answer
287 views
netstat how to exclude localhost from the result when using grep
When I run this command in my terminal:
netstat -an | egrep ":80|:443" | sort
I got this following output:
tcp 0 0 172.104.10.125:48310 172.104.10.125:8081 TIME_WAIT
tcp ...
1
vote
2answers
553 views
How can a server accept incoming traffic to port 443 if it isn't listed in netstat?
I have a server that is currently accepting HTTPS requests and the only thing that shows with netstat -plnt is this:
elijahlynn@web:~$ sudo netstat -plnt
Active Internet connections (only servers)
...
1
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0answers
95 views
Find the process listening on a port (not showing in lsof)
Using Ubuntu 18.04
I want to know which process or kernel function listens on UDP port 38637.
I have researched this problem and found similar questions:
https://superuser.com/questions/42843/...
0
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1answer
73 views
Linux service is listening and responding on ports it wasn't assigned and that don't show up in netstat
I have an Amazon Linux 1 instance that was created from a Solarwinds DPA AMI. I created this around 2 years ago. It is possible I did something weird back then to make this happen.
Today, I upgraded ...
0
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1answer
49 views
Huge amount of imap-login netstat
When I run a netstat -plantu I have a huge amount of ESTABLISHED imap-login, perhaps 50 or 60 connection.
Some connections have in column Send-Q a big number like 3211206 or 114636 for example, and ...
11
votes
3answers
3k views
How to catch DNS request using 'netstat' in Unix
I am working in a bank where 'netcat' is not there. I am having problem wherein one DNS server of the two going down is causing impact. In order to troubleshoot, I need to catch the request (incoming ...
0
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0answers
63 views
List active sessions from tun interface
I'm running CentOS and have a tun interface with IP subnet 10.0.0.0/24 attached for "users".
Is it possible to list current active sessions with netstat, ss or similar?
Ex. netstat something:
tun-...
1
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0answers
272 views
Iptables rule for limiting connections per ip
I'm usig the following iptable rule to limit the amount of simultaneous connections to 1 connection per ip, on port 4387.
/sbin/iptables -A INPUT -p tcp --syn --dport 3387 -m connlimit --connlimit-...
0
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1answer
157 views
Using netsh or netstat (or other native tool) to display UDP traffic to Windows server from given host
We have a Windows server that we suspect is not receiving UDP traffic from a Linux server. We've been able to establish, using tcpdump, that the Linux server is sending UDP traffic and we would like ...
0
votes
1answer
46 views
Filter ss process output without using grep
ss -p can give the process name, process id (PID) and the file descriptor associated with the connection.
Example: ss -tuanp
[...]
tcp ESTAB 0 0 x.x.x.x:59594 x.x.x.x:993 users:(("...
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0answers
92 views
IP Show on netstat -n
Could someone with more experience help me in this?
I have an idea in my head and i've been trying to put it into practice.
I have two machines, one where the application is hosted (I'll call it "...
1
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0answers
19 views
Duplicate Local Port in Virtual Guest's /proc/net/tcp
I'd like to understand the following two entries in my VirtualBox's guest's /proc/net/tcp:
6: 00000000:18EB 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 9581 1 ...
3
votes
0answers
2k views
Network Policy Server + RADIUS not listening on any ports for Windows Server 2019
I must be missing something basic - is there some "master" switch for enabling Network Policy Server? It's not listening on any of the RADIUS ports. Detail:
Trying to setup Windows Server 2019 as a ...
1
vote
1answer
42 views
Local webserver with long response time
We have set up a new infrastructure and all our Laptops/PCs have a the same error:
When trying to open a website from a local webserver, it takes between 10 and 30 seconds. During this time it does ...
3
votes
2answers
71 views
What address should the client connect the socket to [duplicate]
SOLVED
SOLUTION: I tried the connection with a little server program and it works perfectly fine. I could connected it to 10.195.5.53. My problem is within the software of my client program it has ...
2
votes
1answer
1k views
Netstat and ss doesn't see connection
I'm trying to find which application running on Kubernetes cluster is using a specific port to communicate with RabbitMQ cluster. On RabbitMQ I see that connection is coming from 192.168.1.10:34226. ...
0
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0answers
196 views
CENTOS 7 - Auto block IP with null routes
Whenever I notice overload on my media (videos) server, I check for ddos with this command from netstat:
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
It shows currently ...
0
votes
1answer
847 views
Remove tcp entry from netstat -a
I have a rather strange issue and no matter what I do or search, I cannot rectify it and have now decided to seek help here initially.
I have a cluster of servers, about 10 clustered together.
A few ...
0
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0answers
744 views
Why can't I ping 127.0.0.1 from some network interfaces?
I'm on OS Sierra.
This is (part of) what I get on ifconfig
...
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 98:01:a7:b4:91:63
inet6 fe80::4e:52ae:9fa8:...
1
vote
1answer
1k views
netstat vs nmap to find IPs in a local network
I'm in a local network : IPv4 shared address space (100.x.x.x). Connected to a wifi hotspot. Ip ranges : 100.76.164.0/23
When I run :
nmap 100.76.164.0/23 : It says all the hosts are down
netstat -...
2
votes
1answer
754 views
netstat says connection in SYN_SENT but tcpdump captures no data
I'm debugging a ldap problem after ldap client machine upgraded to ubuntu 18.04. Trying to figure out where the problem is, and I noticed the outbound connection is in SYN_SENT, but when I use tcpdump ...
0
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0answers
328 views
Remote Client is unable to connect to TCP Server on VPS (Getting 10060 error)
I have searched all over the internet for the solution. Unfortunately, I could not get any working solution yet. Here is the story.
I am running TCP server for small communication application on the ...
1
vote
1answer
462 views
netstat shows connected socket with path to it, but path doesn't exist
Im inside a docker container and ran netstat -x | grep docker
which got me the:
unix 3 [ ] STREAM CONNECTED 62288711 /var/run/docker.sock
unix 3 [ ] STREAM ...
-1
votes
2answers
100 views
how to get file download connections on linux
I have a site with video content (mp4 files).
When people are watching videos, they are downloading video files from my site. I want to know the number of the active connections via the linux ...
0
votes
1answer
128 views
On a web server, is it normal to see a thousand connections coming from one user?
When I saw so many connections from one IP (by using netstat), I thought it's bot.
(The website is not popular so it's very unlikely to be multiple users behind one IP.)
But I checked apache access ...
0
votes
0answers
210 views
Collectd won't open listener
So I've been stuck with this for sometime now. I want to use collectd with graphite. Im using centos 7. I've made the necessary changes in collectd.conf as seen below:
[root@relay-1 ~]# grep -v "#" /...
2
votes
1answer
129 views
why are there are so many svchost established connections to Isilon?
Our client has a Isilon (used only for smb) with few nodes attached to it. When I run TCPView I don't understand why svchost service established the connection and why there're so many of them:
And ...
0
votes
1answer
321 views
Uderstanding netstat output
When I run netstat -b on Windows 10
I get lots of results of similar nature
TCP 127.0.0.1:64248 LocalHostName:64249 ESTABLISHED
[w3wp.exe]
TCP 127.0.0.1:64249 LocalHostName:...
1
vote
1answer
107 views
Why is kjournald showing up 700 times in `netstat`?
AFAIK, kjournald is not a network program, but a program that deals with the journal of EXT3 (I am running EXT4 on Ubuntu 16.04). Still, when running sudo netstap -tapn it shows up almost 700 times, ...
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0answers
271 views
How to configure Linux to close the connection if Send-Q is never sent?
There is a TCP client-server connection. The application on the server is sending data regularly. Client machine is then reset physically. Netstat shows Send-Q on the server is filling up, the ...
0
votes
1answer
242 views
weird netstat output on netscaler
We have a VPX-1000 netscaler. When traffic suddenly increases our website goes offline and doesn't response to requests but our netscaler load is fine (cpu %40 ram %50 4 cores 4gb). After incident ...
1
vote
1answer
3k views
Debian 8 - getnameinfo Failed Error - netstat
I am experiencing a error/warning when running any netstat command on my Debian 8 machine.
One of the commands:-
netstat | grep http | wc -l
The result:-
getnameinfo failed
getnameinfo failed
...
1
vote
1answer
2k views
What are all these DGRAM items in NETSTAT?
I am assigned a server that has been sending tons of data ourside and isn't used. So, it is most likely compromised. Nothing really seems to be out of order on the server except, they're miles and ...
1
vote
1answer
3k views
Docker networking IPv6 exposed
I'm running a small arm board providing some services within our local network. As I try to understand the ipv6 support of docker, I am quite confused about the results of my first tests.
My network ...
0
votes
1answer
722 views
“0/2” IPv4 destination in “netstat -nr” command on Mac OS X to view host routing table
I'm using the command "netstat -nr" to view the host routing table on a Mac OS X system, and here's the output I'm getting:
Routing tables
Internet:
Destination Gateway Flags ...
