[OpenSIPS-Users] media-relay not relaying when iptables running

[Jeff Pyle]

Jim,

One difference between my iptables setup and yours on my relay is I allow the FORWARD to go, default policy ACCEPT.  Perhaps this is relevant.


- Jeff

On Oct 20, 2011, at 2:33 AM, JimDoesVoip wrote:

Hi All, We're running opensips 1.6.4 and mediaproxy 2.5.2, both on a single server running centos 6. When iptables is turned off media-relay works properly, calls connect and have audio, we see media flow from a IP client, to the media-relay back to IP client. We can't see any entries using the conntrack -L command at this time (maybe because iptables is off?) When we turn iptables on, we see entries in conntrack -L for a bunch of items including the sip signaling to each of the clients, but we do not see any entries for media when in a call (should we?). Our iptables config adds a few accept lines to the filter chain to allow any traffic on a few private interfaces and to allow sip traffic on a high port on any interface. These keep opensips working while iptables is running.

# iptables -t filter -L -v
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
  203 23785 ACCEPT     all  --  any    any     anywhere             anywhere            state RELATED,ESTABLISHED
    2   152 ACCEPT     icmp --  any    any     anywhere             anywhere
    1   201 ACCEPT     all  --  lo     any     anywhere             anywhere
    7  3629 ACCEPT     all  --  bond0  any     anywhere             anywhere
    0     0 ACCEPT     all  --  eth0   any     anywhere             anywhere
    0     0 ACCEPT     all  --  eth1   any     anywhere             anywhere
    0     0 ACCEPT     tcp  --  any    any     anywhere             anywhere            state NEW tcp dpt:ssh
    0     0 ACCEPT     tcp  --  any    any     anywhere             anywhere            state NEW tcp dpt:15060
    9  1177 ACCEPT     udp  --  any    any     anywhere             anywhere            state NEW udp dpt:15060
    0     0 REJECT     all  --  any    any     anywhere             anywhere            reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 REJECT     all  --  any    any     anywhere             anywhere            reject-with icmp-host-prohibited

Chain OUTPUT (policy ACCEPT 137 packets, 33701 bytes)
 pkts bytes target     prot opt in     out     source               destination


# iptables -t raw -L -v
Chain PREROUTING (policy ACCEPT 11495 packets, 2699K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 118 packets, 32010 bytes)
 pkts bytes target     prot opt in     out     source               destination
#


It seems like something isn't getting connected properly, but unfortunately I didn't find a similar problem. When iptables is running there are no errors from media-relay, but no audio is relayed. When iptables is off we see errors complaining about iptables not being loaded, but media is relayed / works in both directions. Thanks very much, Jim O
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