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: [email protected] [mailto:[email protected]] On Behalf Of Tony Graziano Sent: 20 August 2010 08:18 To: Michael Scheidell Cc: [email protected] 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 <[email protected]> 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. 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 redirect it to 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 goes to 192.168.0.2:5080 all traffic to 192.168.0.2:5080 goes to 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-por t-forwarding-599401/> <http://www.linuxquestions.org/questions/linux-networking-3/iptables-por t-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 ________________________________ This email has been scanned and certified safe by SpammerTrap(r). For Information please see http://www.secnap.com/products/spammertrap/ ________________________________ _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users/ -- ====================== Tony Graziano, Manager Telephone: 434.984.8430 sip: [email protected] Fax: 434.984.8431 Email: [email protected] LAN/Telephony/Security and Control Systems Helpdesk: Telephone: 434.984.8426 sip: [email protected] 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.
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