Screend configuration rules

["Bruce B. Platt" <bbp () comport com>]

Does anyone have a pointer to a syntactical guide for screend?
Or examples of the following?

I find the 1991 article by Mogul confusing for what I want to do.

Specifcally, we want to allow icmp echo and echoreply between a host on one
network (whose address is 192.168.2.24) and then entire 
192.168.1.0 network.

My screend complains when I use a syntax like:

between between 192.168.1.0 udp  port 9 icmp type echo icmp type echoreply
and host 192.168.2.24 accept log;

I won't try to explain why I chose this syntax, my reading of Mogul's paper
is evidently faulty.

Thanks and regards,

Bruce

+--------------------------------------+
Bruce B. Platt, Ph.D.
Comport Consulting Corporation
78 Orchard Street, Ramsey, NJ 07446
Phone: 201-236-0505  Fax: 201-236-1335
bbp () comport com, bruce@ bruce.platt@
OR, bruce () bbplatt com