Visit Our UNIX and Linux User Community

Top Forums UNIX for Advanced & Expert Users What hostname is a client using? Post 302139993 by mugambo on Wednesday 10th of October 2007 09:12:23 AM
Old 10-10-2007
What hostname is a client using?

Is there a way to find out what name a client is using to connect to a server? For example: client is telnet'ing or ftp'ing to Server B.domain.com, using name C.domain.com. (B and C resolve to the same IP). Can we, on the server B find out that the client used C.domain.com to connect? I have tried tcpdump, but it prints out destination host B.domain.com, not C.domain.com which is because the IP on the server resolves to B.domain.com(hosts file).
 
Test Your Knowledge in Computers #553
Difficulty: Medium
The standard input (stdin for short), standard output (stdout) and standard error (stderr) are three standard communication streams that are defined by most computer systems.
True or False?

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Hostname

Hello, I am installing redhat linux 6.2 on an intel based system. Whether i want to know any naming conventions should i follow. ie Any convention to follow to name a linux machine(To give hostname). Simillarly for domain name also. Please suggest in this regard (1 Reply)
Discussion started by: bache_gowda
1 Replies

2. IP Networking

looking up hostname

Using Solaris 8 (or WINXP). I am trying to look up a specific DNS hostname, but I don't know which DNS server houses that entry. How can I find the hostname? nslookup gives me the following: C:\>nslookup hostname Server: dnsserver Address: x.x.x.x *** dnsserver can't find hostname:... (2 Replies)
Discussion started by: dangral
2 Replies

3. UNIX for Dummies Questions & Answers

Solaris - unknown hostname - how can I change hostname?

Hello, I am new to Solaris. I am using stand alone Solaris 10.0 for test/study purpose and connecting to internet via an ADSL modem which has DHCP server. My Solaris is working on VMWare within winXP. My WinXP and Solaris connects to internet by the same ADSL modem via its DHCP at the same... (1 Reply)
Discussion started by: XNOR
1 Replies

4. AIX

When/how is $HOSTNAME populated ?

When and how is the variable $HOSTNAME populated ? I am asking because I had a weird situation that just happened. I have created backup scripts that do backups on different servers. Each servers has different folders to be backed up. So I had included a check on $HOSTNAME to find out which... (5 Replies)
Discussion started by: Browser_ice
5 Replies

5. UNIX for Dummies Questions & Answers

Resolve IP to Hostname?

Good day, I would like to resolve IP's to Hostnames using Putty. I'm using Mandriva Linux 2008.0. Is this possible? Perhaps with nmap? (13 Replies)
Discussion started by: McGuywer
13 Replies

6. Programming

Client/Server Socket Application - Preventing Client from quitting on server crash

Problem - Linux Client/Server Socket Application: Preventing Client from quitting on server crash Hi, I am writing a Linux socket Server and Client using TCP protocol on Ubuntu 9.04 x64. I am having problem trying to implement a scenario where the client should keep running even when the... (2 Replies)
Discussion started by: varun.nagpaal
2 Replies

7. Emergency UNIX and Linux Support

HP UX - ILO Console hostname different than Machine Hostname...

Hi All, So we added a new HP-UX 11.31 machine. Copied OS via Ignite-UX (DVD)over from this machine called machine_a. It was supposed to be named machine_c. And it is when you log in...however when I'm in the ILO console before logging in, it says: It should say: What gives? And how do... (4 Replies)
Discussion started by: zixzix01
4 Replies

8. UNIX for Advanced & Expert Users

Hostname -f hostname: Unknown host

deleted (0 Replies)
Discussion started by: hce
0 Replies

9. HP-UX

Get ip of client, not hostname

Hello i'm trying to get the ip of a telnet session. With who -u I get the hostname of the user connecting to my server, because it checks the reverse DNS. But I only want the ip. Versions: HP-UX HP Release B.11.31 Who command: Hewlett-Packard Company - 4 - HP-UX 11i Version... (2 Replies)
Discussion started by: boltpower
2 Replies
ypwhich(1)						      General Commands Manual							ypwhich(1)

NAME
ypwhich - determine which host is the current NIS server or map master. SYNOPSIS
ypwhich [-d domain] [-V1] [-V2] [hostname] ypwhich [-d domain] [-m[mname]] [-t[mapname]] ypwhich -x OPTIONS
Identifies which server is serving v.1 NIS protocol-speaking client processes. Identifies which server is serving v.2 NIS protocol-speak- ing client processes. If neither version is specified, ypwhich attempts to locate the server that supplies the current v.2 services. If there is no v.2 server currently bound, ypwhich attempts to locate the server supplying the v.1 services. Since NIS servers and NIS clients are both backward compatible, the user need seldom be concerned about which version is currently in use. Uses domain instead of the current domain. Finds the master NIS server for a map. No hostname can be specified with -m. The mname argument can be a mapname, or a nickname for a map. When mname is omitted, ypwhich provides a list of available maps. Inhibits nickname translation and is useful if there is a mapname identical to a nickname. Displays the map nickname table. This option lists the nicknames (mnames) that the command knows of, and indicates the mapname associated with each nickname. DESCRIPTION
The ypwhich command identifies the Network Information Service (NIS) server that currently supplies NIS services to an NIS client. It also identifies which NIS server is the master for a map. If invoked without arguments, ypwhich returns the host name of the NIS server for the local machine. If hostname is specified, ypwhich checks that machine to find out which NIS master it is using. Refer to ypfiles(4) and ypserv(8) for an overview of NIS. SEE ALSO
ypfiles(4), rpcinfo(8), ypserv(8), ypset(8) ypwhich(1)

Featured Tech Videos

All times are GMT -4. The time now is 12:57 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy