Visit Our UNIX and Linux User Community


Binding the same port number on different interfaces


 
Thread Tools Search this Thread
Special Forums IP Networking Binding the same port number on different interfaces
# 1  
Old 07-28-2009
Bug Binding the same port number on different interfaces

Hi,

We can use the same port number for two applications based on protocols.(i.e one application is based on TCP and the other application based on UDP).

But i don't know about interfaces, can anyone one help........

1) Can we use same port number for different applications on a single interface.

2) Can we use same port number for different applications on different interfaces(interfaces have separate ip address).


Consider that same port number can be used on different applications, then won,t it be a problem in receiving the packets.

Applications using UDP protocol.
--------------------------------

1) Application 1 is binded to the port number 1500 and ip address of an interface.(Transfer the packet through the selected interface).

2) Application 2 is binded to the port number 1500 and ip address is 0.0.0.0

Now, inorder to transfer the packet of Application 2 an interface has to be selected based on destination's ip address.
If application 2 want's to transfer packets with different destination ip adresses, then different interfaces will be selected for different interfaces.(so application 2 may transfer packet through any one of the available interface and where as application 1 will transfer through the specific interface).

--->After receiving the packet, how should i select the socket of application 1 and application 2.

Problem is both sockets are binded to same port number and interface on which application 2 is transferring the packets are not fixed.

Previous Thread | Next Thread
Test Your Knowledge in Computers #402
Difficulty: Medium
The term 3D printing originally referred to a powder bed process employing standard and custom inkjet print heads.
True or False?

9 More Discussions You Might Find Interesting

1. Solaris

How to find port number wwn of particular port on dual port HBA,?

please find the below o/p for your reference bash-3.00# fcinfo hba-port HBA Port WWN: 21000024ff295a34 OS Device Name: /dev/cfg/c2 Manufacturer: QLogic Corp. Model: 375-3356-02 Firmware Version: 05.03.02 FCode/BIOS Version: BIOS: 2.02; fcode: 2.01;... (3 Replies)
Discussion started by: sb200
3 Replies

2. Shell Programming and Scripting

How to extract port number?

Hi my code is as follow: stringA=`cat /s01/oracle/11.2/network/admin/listener.ora | grep "PORT"` stringB=`cat $ORACLE_HOME/network/admin/listener.ora | grep "PORT"` stringC="PORT" echo ${stringA} echo ${stringB} echo ${stringC} position=`expr index "$stringB" "stringC"` echo... (2 Replies)
Discussion started by: jediwannabe
2 Replies

3. Solaris

Interfaces and Virtual-interfaces queries

Hi Al, In course of understanding networking in Solaris, I have these doubts on Interfaces. Please clarify me. I have done fair research in this site and others but could not be clarified. 1. In the "ifconfig -a" command, I see many interfaces and their configurations. But I see many... (1 Reply)
Discussion started by: satish51392111
1 Replies

4. Programming

how to check port binding in pcap receiving program?

hi, I am writing one packet receiving program using libpcap library. Now, I want to check port is already using or not. how to check in receiver program.. If normal program, bind return value we can able to check the port using or not. but, in pcap program how can i check? thank... (1 Reply)
Discussion started by: ram.sj
1 Replies

5. IP Networking

Binding the port number.

Hi all, Application A is using an port number 100 and is binded to an interface 1. Application B is using an port number 100 and is binded to an interface 2. can we bind the two applications on same port number based on interfaces. what i want to know is two... (3 Replies)
Discussion started by: vijaypdp2006
3 Replies

6. UNIX for Dummies Questions & Answers

port number

hi all i want to connect a system, how can i know the port number of a system. (2 Replies)
Discussion started by: tukuna82
2 Replies

7. UNIX for Dummies Questions & Answers

Need to know port number

Hi expert, I wanted to know in which port my apache is running in solaris box thanks Shaan (1 Reply)
Discussion started by: shaan_dmp
1 Replies

8. UNIX for Dummies Questions & Answers

how to know whether particular port number is free or not

I wish to know whether a particular port is free or not in my SUN solaris SPARC machine . I wish to use that particular port for one server software. How do I know that. (2 Replies)
Discussion started by: Hitesh Shah
2 Replies

9. Cybersecurity

get number of a port

Hello every one. I work in a LAN with many application server. Each one use a different port. What command permit to obtain the number of these port. thanks (2 Replies)
Discussion started by: hoang
2 Replies

Featured Tech Videos