For what it's worth ... I rebooted into 10.3.9 & changed to appropriate port for Phex to match router setting, & bingo ... immediate connection ... no firewall issue. And opened up nicely & behaved nicely.
I then rebooted into 10.4.8 (with Java 1.5) & bingo, Phex immediately connected "healthily" with no firewall icon issue. Nice set of connections too for both OS's but even a couple better now. That's better than the previous versions which were slowish to wake up to an open port. So far thread use is consistent at 58-59 & VM is also consistent at 430-40 MB. Good version!!!
Will see how it behaves after days of use. A good long busy session to test it out.
Maybe's OAH's Apple G3 architecture is getting a bit 'long in the tooth' to handle the
newer ...