Hello list, 

I am getting these hits showing up on my firewall box running Bering UcLibc
2.2.2 with shorewall 2.0. I am not sure why these are happening...

Dec 21 12:23:15 Kronos-Saskatoon Shorewall:all2all:REJECT: IN=eth1 OUT=
MAC=00:04:75:90:02:b2:00:0d:bc:26:c4:80:08:00  SRC=192.168.0.12
DST=154.123.247.142 LEN=44 TOS=00 PREC=0x00 TTL=127 ID=16967 DF PROTO=TCP
SPT=1368 DPT=25 SEQ=767837137 ACK=0 WINDOW=8192 SYN URGP=0

My firewall rules clearly say that my mail server can e-mail outbound PORT
25 TCP. I am not sure why it looks like the mail server is trying to resolve
to the external interface address. (154.123.247.142)
These hits are generated 1:1 for every e-mail that comes in to our mail
server at 192.168.0.12. 

My Policy looks like this:
#SOURCE         DEST            POLICY          LOG             LIMIT:BURST
#                                               LEVEL
loc             net             DROP            ULOG
net             all             DROP            ULOG
# If you want open access to the Internet from your Firewall
# remove the comment from the following line.
fw             net             ACCEPT
fw              loc             ACCEPT
#
# THE FOLLOWING POLICY MUST BE LAST
#
all             all             REJECT          ULOG

My Rules look like this:

#Allow Mail inbound
DNAT            net             loc:192.168.0.150     tcp     25 #Postoffice
(Mail relay - Virus / Spam scanner - Relay's mail to Exchange server @
192.168.0.12)

#Allow MAIL outbound FROM EXCHANGE ONLY!!!
ACCEPT          loc:192.168.0.12              net     tcp     25

Can anyone tell me what could be happening here that would cause these hits?
Am I missing something in my polices or rules?

Thanks in advance!


Troy



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