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How to make RMI bypass firewall?

How to make RMI bypass firewall?# Java - 爪哇娇娃

u*e2004-08-25 07:08

1 楼

Anybody knows how to make RMI bypass firewall without using http tunneling?
In other words, how to fix port in RMI so that it can be used when firewall is
in between?
Many thanks.

a*a2004-08-25 07:08

2 楼

is
RMI by default uses 1099. Open the port on your wall. You can also
use your own port.

【在 u**********e 的大作中提到】

: Anybody knows how to make RMI bypass firewall without using http tunneling?
: In other words, how to fix port in RMI so that it can be used when firewall is
: in between?
: Many thanks.

u*e2004-08-25 07:08

3 楼

It doesn't work.
1099 is just server socket. Server listens and waits there for request from
client. When it get request, it just pickup a port randomly(from free port) to
callback to client

tunneling?
firewall

【在 a*****a 的大作中提到】

:
: is
: RMI by default uses 1099. Open the port on your wall. You can also
: use your own port.

a*a2004-08-25 07:08

4 楼

to
Sounds ridicules. The so called "randomly port" is a client port, not a server
port. Server can't "pikcup" such kind of a port. Also, No firewall blocks
client ports. Otherwise, you even can't browse the net.

【在 u**********e 的大作中提到】

: It doesn't work.
: 1099 is just server socket. Server listens and waits there for request from
: client. When it get request, it just pickup a port randomly(from free port) to
: callback to client
:
: tunneling?
: firewall

u*e2004-08-25 07:08

5 楼

It's not truth. Some users (gov., military, finance,etc) have certain
internal network for specific purpose (Storage, datacenter, etc). They won't
allow even port 80 opened. (One of our customer happen to be in this case)
I already found the solution from web. You can see more explanation here:
http://www.javacoding.net/articles/technical/rmi-firewall.html

from
port)
server

【在 a*****a 的大作中提到】

:
: to
: Sounds ridicules. The so called "randomly port" is a client port, not a server
: port. Server can't "pikcup" such kind of a port. Also, No firewall blocks
: client ports. Otherwise, you even can't browse the net.

a*a2004-08-25 07:08

6 楼

En, I was wrong. I thought the "random port" you mentioned is client socket.
Coz I know RMI prefers to pick up some special server sockets like 0, unlik
ftp protocol. Well, just configure your firewall for RMI protocol...

【在 u**********e 的大作中提到】

: It's not truth. Some users (gov., military, finance,etc) have certain
: internal network for specific purpose (Storage, datacenter, etc). They won't
: allow even port 80 opened. (One of our customer happen to be in this case)
: I already found the solution from web. You can see more explanation here:
: http://www.javacoding.net/articles/technical/rmi-firewall.html
:
: from
: port)
: server

l*u2004-08-25 07:08

7 楼

using http tunneling yah
which will take use of port 80( the http port) to transfer request

is

【在 u**********e 的大作中提到】

: Anybody knows how to make RMI bypass firewall without using http tunneling?
: In other words, how to fix port in RMI so that it can be used when firewall is
: in between?
: Many thanks.