My problem is to determine which ip address will be used by applications
when there are multiple nics and virtual interfaces configured:
e.g. I have a sun (solaris 10 but I don't think that this is a solaris 10
specific problem) with ce0 in network a and ce1 in network b. on ce0 there
are virtual interfaces ce0:1 etc in network a configured. It is not
configured as a router and /etc/defaultgateway contains the gateway from
network a. So I would expect that nic ce0 and the gateway of network a
will be used to get into another networks (and that is what I want to).
But the fact is that both interfaces are used for internet connections.
Has anyone an idea how to configure the sun that nic a will be preferred
for connections with other networks ?
I suppose you have to bind the application to specific network interface:
example:
Apache, httpd.conf:
Listen <hostname>:<port>
or
Listen <ip_address>:<port>
Oracle listener:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = <hostname>)(PORT = <port>))
Real/Logical Hostname or IP address represent your network interfaces.
The other theme I'm interested in is how to determine which ip address is
used as a sender address when there are multiple ip addresses configured
on one nic . Some applications use the virtual some the physical address.
Can I define somewhere in the os which address is used by applications ?
Use netstat:
netstat -an | grep LISTEN --> to see on which interface and port your
application is listenning
netstat -an | grep ESTABLISHED --> to see on which interface/ports the
established connection are.
Regards,
Dimitre
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