Complication of pll hangs while doing it via adadmin,do other adadmin activities completes fine...th

As a part of our security tighening ,we implemented port restriction between our Apps node and DB nodes.after that pll complication via adadmin or adpatch hangs..all other activities using adadmin ,like compiling FORMS,compiling invalid objects,working fine.As soon as port restriction is disabled adadmin session which was hanging starts by itself

Follow are the ports open between App nodes and DB nodes
ssh 22
NFS(tcp) 541-1024
NFS(upd) 3400-6500
DB PORT 1521
DB PORT 1525
OEM PORT 1158

We are on 2-node DB with 11.2.0.3 DB and cluster and 2-node App(non-Shared) with hardware cisco loadbalancer(PCP also enabled).All other serices are running in both nodes