https://community.sophos.com/products/unified-threat-management/astaroorg/f/53/t/32198
Lets try this again...
I am curious about the traffic from IP addresses:
128.242.114.242 (rdns mail2.after.college.com) at NTT America.
218.213.238.228 (no rdns) at HKNET-Hong Kong.
213.198.65.27 (rdns euu0300091-pip.eu.verio.net) NTT/Verio Europe.
69.10.147.66 (rdns unknown.rackforce.com) at RackForce Hosting.
Specifically regarding src port 2080.
src port is always 2080
dst port varies (30000-59999)
all traffic is tcp
The only proxys involved are on/in the ASG box. If any other proxies outside my modem exist I would like to know.
Since from what I have observed, up2date appears to use only ports 443 and 80. Because of this belief, the traffic described herein appears odd to me.
Does up2date also require port 2080 to function correctly or close a connection? The packet data captured in front of the ASG indicates that the connection is trying to close and is retransmitting. These retransmissions are what the ASG's packet capture feature is logging. I do not know what the standard is for making sure a port is closed, but since the traffic is tcp and not udp I do not believe that 24 packets are required to close a connection. Which is what the ASG logged this morning from 09:38 to 10:00 GMT from IP 128.242.114.242 to two different dst ports (48775 and 37739). Am I wrong about anything I have stated?
Note: I have port 2080 blocked in the packet filter rules (along with many other ports).
This traffic causes me some anxiety since I do not know the purpose of the traffic's original cause.
Will someone please explain this traffic?
Note: All my log data is sent to both Mynetwatchman and Dshield.
out.
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