ditto. (Though, to be fair, I've only just started trying to get this to work -- didn't have it working pre-2.7)

op_server.cfg

; port to listen for inbound flash connections, default 4445
; listen_port=4445
listen_port=4444

fop2.cfg

; Daemon definitios
;listen_port = 4445
;restrict_host = www.asternic.org

daemon running, on 4445 for fop2

[root@localhost fop2]# pgrep fop2
26093
[root@localhost fop2]# netstat -nlp | grep 4444
tcp 0 0 0.0.0.0:4444 0.0.0.0:* LISTEN 25840/perl
[root@localhost fop2]# netstat -nlp | grep 4445
tcp 0 0 0.0.0.0:4445 0.0.0.0:* LISTEN 26093/fop2_server
[root@localhost fop2]# iptables -vnL
Chain INPUT (policy ACCEPT 566K packets, 128M bytes)
pkts bytes target prot opt in out source destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination

Chain OUTPUT (policy ACCEPT 520K packets, 123M bytes)
pkts bytes target prot opt in out source destination

--test works ok

[root@localhost fop2]# ./fop2_server --test
Flash Operator Panel 2 - No valid license found. Demo Mode
Connection to manager OK!
[root@localhost fop2]#