I know this is an old discussion - but your problem is, imho, self-inflicted.
The default is zero (0)
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--
1)check the port is available or not.If it dosn't find the port,it should throw the error message(i.e. port not... (0 Replies)
In general for intalling a package like we do
./configure, make , make install
But if we want to integrate the package with a huge source base
what are the things to be taken care
could some one have a light on purpose of ./configure , make and make install
along with above question.
I... (1 Reply)
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.
1) Build Your Own Open Source NAS Device Using FreeNAS | Train Signal Training - Free Computer Training Videos
2) Build Your Own Open Source... (4 Replies)
Hello all. I have never had any issues like this when compiling applications from source. When I try to compile samba-3.5.0pre2, configure runs with no issues, but when the time comes to make, this happens:
make: make 1254-025 There must be an existing description file or specify a target.
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Hello Gurus,
I was trying to find who's using my port and got below answer from a IBM website. But the problem with the below answer is I need a root to run the rmsock, is there any other alternative to find out who is using my port with out a root access??
1. netstat -Aan | grep <port... (1 Reply)
Hi all,
I need to change the source port number of an outgoing TCP packet. First I have to bind the socket to a particular port(suppose 9001) but when I send the TCP packet I want to change the source port number lets say to 9002 still letting the socket to be bound to the same old port (9001).... (0 Replies)