UFW blocking some allowed internal connections

UFW blocking some allowed internal connections

My set up is this:
Server 1 (192.168.1.1) - nginx (load balance) - Ubuntu 12.04 LTS
Server 2 - uwsgi - Debian 7.1
Server 3 - uwsgi - Debian 7.1
UFW on server 2 and server 3, is blocking certain requests coming from
server 1 (nginx) and is showing up in nginx error log as "upstream timed
out". Traffic between nginx and uwsgi server is all on a private network.
This is UFW setup on uwsgi servers:
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing)
New profiles: skip
To Action From -- ------ ----
Anywhere on eth1 ALLOW IN Anywhere
Anywhere ALLOW IN 192.168.1.1
Anywhere (v6) on eth1 ALLOW IN Anywhere (v6)
Example UFW block in syslog:
Aug 20 13:56:16 kernel: [1028623.806318] [UFW BLOCK] IN=eth1 OUT=
MAC=68:05:ca:17:c9:fb:68:05:ca:17:ca:0e:08:00 SRC=192.168.1.1
DST=192.168.1.103 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=54877 DF PROTO=TCP
SPT=41652 DPT=8000 WINDOW=14600 RES=0x00 SYN URGP=0
If I disable UFW on Uwsgi servers the timeouts in nginx stops. At the
moment the timeouts/blocks are mostly frequent ajax calls (every 2mins),
but not exclusively.