this is the only way I could get it to work if you are keeping the ip
the same.
(well, others might have. tshark didn't see the forwarded port!!!!)
*nat
:OUTPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A PREROUTING -p udp --dport 5060 -s 217.37.32.162 -d 10.227.122.31 -j
REDIRECT --to-port 5080
COMMIT
I assume that I can add additional prerouting ?
(note: I tried this with tcp. rediecting a certain source source
hitting 5060 to tcp 80. and pulled up the web page.
again, tshark didn't see the new port.
I am assuming this will work with udp although the states arn't there.
I will try with voip.ms ip authentication now.
full instructions: centos5:
run this and enable the firewall:
/usr/bin/system-config-securitylevel-tui
edit /etc/sysconfig/iptables, remove everything and put this in:
*nat
:OUTPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A PREROUTING -p udp --dport 5060 -s 217.37.32.162 -d 10.227.122.31 -j
REDIRECT --to-port 5080
COMMIT
(remember, no blank lines!)
/etc/init.d/iptables restart
done.
On 8/20/10 5:24 AM, Sven Evensen wrote:
We use iptables on several of our machines to overcome the fact that
ITSP cannot send on 5060,
works perfectly. Here is our setup:
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*nat
:OUTPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A PREROUTING -p udp --dport 5060 -s 217.37.32.162 -i eth+ -j DNAT
--to 10.227.122.31:5080
COMMIT
------------------------------------------------------------------------
*From:* sipx-users-boun...@list.sipfoundry.org
[mailto:sipx-users-boun...@list.sipfoundry.org] *On Behalf Of *Tony
Graziano
*Sent:* 20 August 2010 08:18
*To:* Michael Scheidell
*Cc:* sipx-users@list.sipfoundry.org users
*Subject:* Re: [sipx-users] iptables experts: port forwarding.
The startup scriptfor sipx checks to see if iptables is running,
because it is automatically "problematic" if it is...
On Thu, Aug 19, 2010 at 11:14 PM, Michael Scheidell
<michael.scheid...@secnap.com <mailto:michael.scheid...@secnap.com>>
wrote:
It just occurred to me that sipx on centos has iptables. maybe not
active, but its got it.
can I use iptables, internally, without involving natting to do
selective port forwarding.
example:
private ip address of 192.168.0.2 sipx.secnap.com
<http://sipx.secnap.com>.
public ip of ITSP: 4.2.2.2
I want to do something like this:
if traffic comes in from source ip 4.2.2.2 to 192.168.0.2:5060
<http://192.168.0.2:5060> redirect it to 192.168.0.2:5080
<http://192.168.0.2:5080>
(assuming that the original firewall did the natting. pretend here
isn't one)
all other traffic to 192.168.0.2:5060 <http://192.168.0.2:5060> goes
to 192.168.0.2:5080 <http://192.168.0.2:5080>
all traffic to 192.168.0.2:5080 <http://192.168.0.2:5080> goes to
192.168.0.2:5080 <http://192.168.0.2:5080>.
pretend I know lots about freebsd and ipfw and just tonight figures
out how to type 'iptables --list'
eg: tutor me.
I am thinking that if this can be done, it might make life easier for
people like me and mitchel who can't get the ITSP to send to port 5080.
before I take m live phone system offline, look here, several
paragraphs down:
<http://www.linuxquestions.org/questions/linux-networking-3/iptables-port-forwarding-599401/>
they do something like this:
echo 1> /proc/sys/net/ipv4/ip_forward
iptables -t nat -A PREROUTING -p tcp -s *route_only_for_this_ip* -d *router_ip*
--dport 80 -j DNAT --to *destination_ip*:*destination_port*
iptables -t nat -A POSTROUTING -o eth0 -d *destination_ip* -j SNAT --to-source
*router_ip*
so, echo 1 > /proc/sys/net/ipv4/ip_forward (might not be needed)
but
iptables -t nat -A PREROUTING -p tcp -s 4.2.2.2 -d localhost --dport
5060 -j DNAT to localhost:5080
--
Michael Scheidell, CTO
o: 561-999-5000
d: 561-948-2259
ISN: 1259*1300
> *| *SECNAP Network Security Corporation
* Certified SNORT Integrator
* 2008-9 Hot Company Award Winner, World Executive Alliance
* Five-Star Partner Program 2009, VARBusiness
* Best in Email Security,2010: Network Products Guide
* King of Spam Filters, SC Magazine 2008
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--
======================
Tony Graziano, Manager
Telephone: 434.984.8430
sip: tgrazi...@voice.myitdepartment.net
<mailto:tgrazi...@voice.myitdepartment.net>
Fax: 434.984.8431
Email: tgrazi...@myitdepartment.net <mailto:tgrazi...@myitdepartment.net>
LAN/Telephony/Security and Control Systems Helpdesk:
Telephone: 434.984.8426
sip: helpd...@voice.myitdepartment.net
<mailto:helpd...@voice.myitdepartment.net>
Fax: 434.984.8427
Helpdesk Contract Customers:
http://www.myitdepartment.net/gethelp/
Why do mathematicians always confuse Halloween and Christmas?
Because 31 Oct = 25 Dec.
--
Michael Scheidell, CTO
o: 561-999-5000
d: 561-948-2259
ISN: 1259*1300
> *| *SECNAP Network Security Corporation
* Certified SNORT Integrator
* 2008-9 Hot Company Award Winner, World Executive Alliance
* Five-Star Partner Program 2009, VARBusiness
* Best in Email Security,2010: Network Products Guide
* King of Spam Filters, SC Magazine 2008
______________________________________________________________________
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For Information please see http://www.secnap.com/products/spammertrap/
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