I know this is an old discussion - but your problem is, imho, self-inflicted.
Code:
michael@x071:[/home/michael]nfso -h nfs_use_reserved_ports
Purpose:
Specifies using nonreserved IP port number.
Values:
Default: 0
Range: 0 - 1
Type: Dynamic
Unit: On/Off
Tuning:
Value of 0 will use nonreserved IP port number when the NFS client communicates with the NFS server.
In the early 1980's there was this idea that port numbers less than 1024 could be "trusted" because only the super-user (aka root) could access them. This trust has been misplaced since the late 1980's as too many processes can access this so-called trusted ports. Why trust NFS (on port 2049)? It is well above 1024. Why it that number above 2049 trust-worthy and not other numbers.
In short, "trusted ports" exist in that it is still specified that a kernel privilege is needed to "open" aka request a connection from/to any other port.
If someone, even from your local security, says they MUST be 1023 and smaller - of course you can comply - BUT they are causing another security concept to become breached - availability. Not enough ports means no connectivity.
In short, port numbers - there is no added trust because a specific port number is being used. There might be a technical reason (e.g., firewall rules) to stay in a particular range - but the port number itself neither adds nor subtracts from the application security.
Hi Guys,
i am trying to open a port in AIX.
but i am not able to get the command for this. AIX is not having the iptables file present.
So please any body can tell me how to open a port in AIX...
Thanks
sanju (2 Replies)
Hi,
I am working with sun Solaris 5.9 and in my application,I have to communicate with Serial port(i.e /dev/term/a).
So I need source code to by which I can do the following things--
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In general for intalling a package like we do
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Hi,
I was looking on Google for AIX-VIO/LPAR with ISCSI solution and found following really nice tutorial about how to setup ISCSI with free NAS.
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Hello Gurus,
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Hi all,
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Discussion started by: Mcipamo
5 Replies
LEARN ABOUT DEBIAN
ldns-notify
ldns-notify(1) General Commands Manual ldns-notify(1)NAME
ldns-notify - notify DNS servers that updates are available
SYNOPSIS
ldns-notify [options] -z zone servers
DESCRIPTION
ldns-notify sends a NOTIFY message to DNS servers. This tells them that an updated zone is available at the master servers. It can perform
TSIG signatures and it can add a SOA serial number of the updated zone. If a server already has that serial number it will disregard the
message.
OPTIONS -z zone
The zone that is updated.
-h Show usage and exit
-v Show the version and exit
-s serial
Append a SOA record indicating the serial number of the updated zone.
-p port
Use port as destination port (default the DNS port 53) for the UDP packets.
-y key:data
Use the given TSIG key and base64-data to sign the NOTIFY. Uses the hmac-md5 algorithm.
-d Print verbose debug information. The query that is sent and the query that is received.
-r num Specify the maximum number of retries before notify gives up trying to send the UDP packet.
EXIT CODE
The program exits with a 0 exit code if all servers replied an acknowledgement to the notify message, and a failure exit code otherwise.
AUTHOR
Written by the ldns team as an example for ldns usage.
REPORTING BUGS
Report bugs to <ldns-team@nlnetlabs.nl>.
COPYRIGHT
Copyright (C) 2005 NLnet Labs. This is free software. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
POSE.
9 Jan 2007 ldns-notify(1)
08-15-2018
