netstat output


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting netstat output
# 1  
Old 05-05-2015
Question netstat output

Hi Team,

Below is the output of netstat -an | grep 1533

Code:
tcp        0      0 17.18.18.12:583       10.3.2.0:1533           ESTABLISHED
tcp        0      0 17.18.18.12:370       10.3.2.0:1533           ESTABLISHED

Below is the o/p of netstat -a | grep server_name

Code:
tcp        0      0 local_server:53083 remote_server:virtual-places ESTABLISHED
tcp        0      0 local_server:39470 remote_server:virtual-places ESTABLISHED


Does port number also changes for "-an" and "-a" options?

If yes how to identify the link b/w
Alphabatic port name (virtual-places) and Numerical port name (1533)
# 2  
Old 05-05-2015
Seems to me the second and third digits of the 5-digit ephimeral port number are being left out in the your netstat -an listing somehow, looks like a bug to me...
# 3  
Old 05-05-2015
Ip iddresses were modified.
Please treat below as o/p of netstat -an

Code:
tcp        0      0 local_ip:583       remote_ip:1533           ESTABLISHED
tcp        0      0 local_ip:370       remote_ip:1533           ESTABLISHED

# 4  
Old 05-05-2015
OK, so then there is no bug.. The difference with netstat -an is that host names are used and the former just ip-adresses. The port numbers stay the same..
# 5  
Old 05-05-2015
From the RHEL netstat manual:

Code:
   --numeric , -n
       Show numerical addresses instead of trying to determine symbolic host, port or user names.

   --numeric-hosts
       shows numerical host addresses but does not affect the resolution of port or user names.

   --numeric-ports
       shows numerical port numbers but does not affect the resolution of host or user names.

   --numeric-users
       shows numerical user IDs but does not affect the resolution of host or port names.

So you man get your required result with --numeric-hosts
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Filtering netstat command output

Hi All, I am trying to collect the listen ports info from netstat command in centos 7 From that info i am trying to collect all the foreign address IP for those ports. I am using below script to do the same. netstat -an |grep -w "LISTEN" |grep -v "127.0.0.1" |awk '{print $4}' >... (3 Replies)
Discussion started by: sravani25
3 Replies

2. UNIX for Dummies Questions & Answers

netstat -an output, pls. explain..

Hi, I have old SCO O/S. System keeps crashing. I made lot of changes to kernel but so for nothing helped. I wrote a script which takes netstat -an output every one minute. I saw some thing right before the system crashed. Not sure if this means anything.. uname -a SCO_SV djx2 3.2... (2 Replies)
Discussion started by: samnyc
2 Replies

3. UNIX for Advanced & Expert Users

Amount of Network Traffic info from netstat output

Hi, I'm trying to figure out how much traffic has been generated and received from netstat -s output (using Linux). I can see the output shows packet counts and Octet values, how would I correctly calculate how much traffic in and how much out? My output below: Ip: 88847576 total... (1 Reply)
Discussion started by: wilsonee
1 Replies

4. IP Networking

Connections not shown in netstat output

I have a TCPIP server application (a Vendor package) which by default allows 10 connections. It provides a parameter to allow us to increase the maximum allowable connections in case it is needed. Intermittently this application is failing with maximum number of connections reached even when there... (1 Reply)
Discussion started by: AIX_user
1 Replies

5. IP Networking

netstat output

I can't tell what the output of the netstat command means. Is there anywhere that has this information? I tried the man pages, but they weren't helpful. (3 Replies)
Discussion started by: Ultrix
3 Replies

6. UNIX for Dummies Questions & Answers

interpreting netstat output

hi all, when I run- wcars1j5#netstat -an | grep 8090 127.0.0.1.8090 *.* 0 0 49152 0 LISTEN wcars1j5# 1. does this mean that no one is connected to this port? Regards, akash (1 Reply)
Discussion started by: akash_mahakode
1 Replies

7. HP-UX

Difference in netstat -a and -an output.

Hi, Does anyone know why I get a different output when using "netstat -a" or "netstat -an" ?? # netstat -a | grep ts15r135 tcp 0 0 nbsol152.62736 ts15r135.23211 ESTABLISHED # netstat -an | grep 172.23.160.78 tcp 0 0 135.246.39.152.51954 ... (4 Replies)
Discussion started by: ejdv
4 Replies

8. Solaris

netstat -an -- meaning of the output

Dear Experts, I put below command- could you please describe the outputs column- let me describe some them- col_1: (10.131.60.48.55880) The IP address of the local computer and the port number being used for this particular connection appear in the Local Address column. col_2:... (3 Replies)
Discussion started by: thepurple
3 Replies

9. Shell Programming and Scripting

filtering a range of ports out of a netstat output

i'd like to grep a range of ports on a netstat -nt output, localaddress, say :1 to :1023. how do i do it via sed/awk/grep? Thanks, Marc (1 Reply)
Discussion started by: marcpascual
1 Replies

10. UNIX for Dummies Questions & Answers

output of NETSTAT

# netstat -in Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll net1 1500 192.168 192.168.0.11 24508 0 12212 112931 2795 lo0 8232 127 127.0.0.1 42 0 42 0 0 atl0* 8232 none none No Statistics... (1 Reply)
Discussion started by: samprax
1 Replies
Login or Register to Ask a Question