D
Deleted member 45312
Guest
Dear FreeBSD users,
This my first post and my English is a bit bad, so please be indulgent.
I am running FreeBSD 10.1 amd64 on my personal Internet gateway and all is working flawlessly. This gateway is in front of my home private network made of about 10 devices (PCs, smartphones, etc ...). I have only one public IP address and I use the IP private range 192.168.0.0/24 for my private network.
But I saw in the log file /var/log/security of IPFW running on my gateway that sometime external machines on the Internet are trying to connect to machines behind my gateway on my private address range.
Then I tried to investigate how they are knowing which private network addresses I am using, by running
After some time, I got some frames which are not nated and I looked at that with
I don't know why those frames are going out from my private network.
This my first post and my English is a bit bad, so please be indulgent.
I am running FreeBSD 10.1 amd64 on my personal Internet gateway and all is working flawlessly. This gateway is in front of my home private network made of about 10 devices (PCs, smartphones, etc ...). I have only one public IP address and I use the IP private range 192.168.0.0/24 for my private network.
But I saw in the log file /var/log/security of IPFW running on my gateway that sometime external machines on the Internet are trying to connect to machines behind my gateway on my private address range.
Then I tried to investigate how they are knowing which private network addresses I am using, by running
tcpdump
on the interface facing the Internet :
Code:
# tcpdump -i rl0 -XX -w tcpdump.out -vvv host 192.168.0.10
wireshark
. All those frames are warned [TCP ZeroWindow] by wireshark
.I don't know why those frames are going out from my private network.