Hi Ian, I don't think there is any need for concern, it simply means that a computer in Japan sent a UDP packet to port 3544 to your system at mb7njd.ampr.org. Port 3544 is used for IPv6 to IPv4 tunneling, and is essentially harmless. Why they picked you to send it to is (and will probably remain) unknown. It's probably just part of the general junk on the Internet. - Brian

On Sat, Jun 03, 2017 at 11:31:11AM +0100, gm4upx@gb7jd.co.uk wrote:

With the changes taking place I have been monitoring both the " old " and the " new " addresses. I'm receiving rip broadcasts from both and additionally similar broadcasts to the two lines below on the " old " address only.

amprgw.sysnet.ucsd.edu > 172.16.1.4: IP (tos 0x0, ttl 111, id 14685,

offset 0, flags [none], proto UDP (17), length 90) 218-228-138-51f1.osk3.eonet.ne.jp.25465 > mb7njd.ampr.org.3544: [udp sum ok] UDP, length 62

I have little knowledge of the meaning of this and would appreciate someone explaining it to me.

Thanks in advance.

( Monitored from eth0 at 172.16.1.4 which is in DMZ )

Regards, Ian..