Hi Folks, I hope this is an easy one for you, I've run out of ideas. I have an exchange server which is not receiving mail since the installation of the UTM
We've got a new site with a pretty greenfield install. They have a netgear adsl router. Downstream of this we now have a UTM appliance.
The netgear is set to allow and forward all traffic on to the external interface of the UTM.
The UTM has the following nat rules:
Any - email messaging - external (WAN) (address)
dest - exchangeserver
automatic firewall rule
Any - HTTP - external (WAN) (address)
dest - exchangeserver
automatic firewall rule
Any - HTTPS - external (WAN) (address)
dest - exchangeserver
automatic firewall rule
Any - RDP - external (WAN) (address)
dest - exchangeserver
automatic firewall rule
RDP, HTTP and HTTPS all work and yet I find these messages in the firewall log:
11:03:44 TCP 204.101.246.233 : 46413 ? 192.168.50.2 : 25 [ACK FIN] len=52 ttl=52 tos=0x00 srcmac=0:1e:2a:ec:f8:a6 dstmac=0:c:29:a5:50:71
11:05:03 TCP 78.129.200.3 : 50700 ? 192.168.50.2 : 25 [RST] len=40 ttl=54 tos=0x00 srcmac=0:1e:2a:ec:f8:a6 dstmac=0:c:29:a5:50:71
11:18:43 Default DROP TCP 192.168.100.2 : 25 ? 204.101.246.233 : 46933 [ACK RST] len=40 ttl=127 tos=0x00 srcmac=0:c:29:13:e4:9a dstmac=0:c:29:a5:50:7b
11:18:44 Default DROP TCP 192.168.100.2 : 25 ? 204.101.246.233 : 46983 [RST] len=40 ttl=127 tos=0x00 srcmac=0:c:29:13:e4:9a dstmac=0:c:29:a5:50:7b
11:18:44 Default DROP TCP 192.168.100.2 : 25 ? 204.101.246.233 : 46933 [RST] len=40 ttl=127 tos=0x00 srcmac=0:c:29:13:e4:9a dstmac=0:c:29:a5:50:7b
I can't figure out why this traffic is being dropped - can anyone give me some advice please?
Many thanks
Andy
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