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Questions tagged [netstat]

netstat is a tool for viewing active network connections, listeners and sockets.

netstat is a tool for viewing active network connections, listeners and sockets.

322 questions
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Display IP & TCP statistics per interface (netstat -s with interface)

Linux has the ability to display protocol statistics with netstat -s. The output looks something like: Excerpt: 7487 times unabled to send RST due to no memory TCPDSACKIgnoredOld: 817 TCPDSACKIgnoredNoUndo: 7246527 TCPSpuriousRTOs:…
data
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Port 80 doesn't work

I have a website in my ubuntu server 14.04, with apache2 server, and untils fews days go the site works fine but, today if I digit www.mydomain.com from my internal network it works but, if I try with external network my site doesn't work and I have…
Fabio
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there is empty ips in netstat

I have installed ddos deflate on my sever (centos6.5 64bit) and in server mailbox I see that ddos deflate has been blacklisted empty Ip. and when I run this command on ssh I see: netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort…
Mehdi Azizi
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netstat brought up strange ip

I just ran netstat -vatn and found there was a connection ESTABLISHED on :22 from my ip and another unknown ip. Moments later I ran it again and found the connection was gone. I have a default installation of openssh-server-5.3 that runs on port 22.…
N0M3
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How does netstat get a hostname from IP while nslookup & nblookup fail every time?

In Windows Server 2003, when I run netstat with no flags, it takes much longer than netstat -n to return results. I realize this is because it has to perform reverse lookups by IP address to get the corresponding hostname. There are some rows in…
Nico M
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Application Unable connect Remote Server. FIREWALL Issue

Developing a C# Application that uses an WDSL/SOAP service and connects to a server via port 443 I know it is a Firewall Windows 2008 Server issue. Because when I disable it, it works perfectly. Trying to create a rule allowing inbound connections…
kmxillo
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how to display netstat output on nagios

Can you please tell me how to monitor an established connection (on a specified port) in a windows machine from nagios (centOS) here an example (output of netstat): Proto Local Address Foreign Address State TCP 192.168.1.96:1551…
Abdelilah Benaou
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IP routing Solaris 9 access the internet from local network

I am trying to configure the NICS on the Solaris Sparc server. My problem lies in getting out to the "Internet" from the local network. I have requested the NIC to receive a DHCP server address #ifconfig -interface dhcp start. If anyone could guide…
help_me
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Strange ports on default install of W7

I have a base new install of windows 7, and when I went to look for something else I saw the attached netstat output. What concerns me is that this is Windows + Truecrypt + drivers, nothing else installed. The sequential high ranged ports belonging…
Sabre
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Netstat doesn't work on FreeBSD by php function exec()

In my php-app I need the list of all IP's connected on port 80. I've chosen to do it this way: But it doesn't work on my VPS FreeBSD…
Andrei Zhamoida
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Reverse-resolved address ending with .bng?

I routinely check netstat --tcp when ssh'ed into my server, but today found an odd hyphenated address format that I haven't seen before: Proto Recv Sent Local Address Foreign Address State tcp6 0 0 …
xVagabondx
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How to check if sockets are sending/receiving data on linux?

I often have to debug processes which involve a server client tcp connection. I'd like to check, during times where a client might seem stuck, whether the server is sending it data or not. I can use: 'netstat -tpe | grep PID_SERVER' to find the…
Palace Chan
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Find IP addresses with most connections on system

I am currently experiencing some attacks on my OpenVZ server (CentOS 6.3 64bit), which is saturating the public ethernet interface (currently accessing SSH via the private interface). Is it possible to display the IP addresses with the most inbound…
Justin
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No response from IIS

My problem is that the Default Web Site can be opened from the server machine (localhost), but cannot be opened from a test machine (which is in the same LAN). Netstat says that IIS 7.5 is listening on 0.0.0.0:80. WireShark shows that the browser on…
kol
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How can I find the cause of an unknown connection showing in iftop?

I have connections like this showing frequently in iftop: 12.15.127.75.host.nwnx.net => 121.61.153.172 480b 160b 40b I have no idea what it is or where it's come from. A netstat -a…
rastaboym
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