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Full Discussion: Name resolution is only working from server side. Clients cannot resolve host names.
Operating Systems Linux Red Hat Name resolution is only working from server side. Clients cannot resolve host names. Post 302729297 by dbadmin100 on Friday 9th of November 2012 12:06:45 PM
Old 11-09-2012
I had removed the bind packages by the time your message was posted. But this time I did not install the bind-chroot package and used the standard bind. However, I hit exactly the same issue. [can ping ip addresses in all directions but hostname ping only works from server]. So I checked the udp/tcp port 53 but did not find them in netstat -an. I issued the following commands as found in google and did /etc/init.d/iptables restart but no joy. So looks like this might be the issue why my clients cannot reach the dns server. Any ideas on how to open udp and tcp port 53 please (CentOS 5)?

Code:
iptables -A INPUT -p tcp -m tcp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
iptables -A INPUT -p udp -m udp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p udp -m udp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT

 

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LEARN ABOUT SUSE

rarpd

RARPD(8)						      System Manager's Manual							  RARPD(8)

NAME

       rarpd - reverse address resolution protocol daemon

SYNOPSIS

       rarpd [-v] [-i interface ]

DESCRIPTION

       Rarpd listens on the ethernet for broadcast packets asking for reverse address resolution.  These packets are sent by hosts at boot time to
       find out their IP address.  Rarpd looks up the six octet ethernet number in the ethers map finding a host name.	This name is translated to
       the IP address of the host by a DNS lookup.  The IP address is then sent to the host.

       Before rarpd can start its service it first finds out what the IP address and hardware address of the ethernet is.

       Warning!  Sun diskless workstations assume that the first RARP server that answers is the host they are to boot from.  For this to work all
       other Sun RARP servers delay their answer if they are not also the requestors boot server.  This rarpd does not have this kludge so it will
       happily	engage	the Sun boot server to see who can answer the client first.  Unless your host can actually serve a Sun diskless client, it
       is better not to list any more hosts in the ethers file than necessary.

OPTIONS

       -v     Be verbose. Show requests which the daemon is responding to.

       -i     Bind to the named interface. By default rarpd binds to the default interface for the local system type, if available.

SEE ALSO

       ifconfig(8), ethers(5), hosts(5),

AUTHOR

       Derrick J. Brashear (shadow@dementia.org)

       The man page is mostly from the Minix version, by Kees J. Bot (kjb@cs.vu.nl)

																	  RARPD(8)
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