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Subject: Re: ARP issue, samba standalone connection problem
From: Gary Aitken <freebsd@dreamchaser.org>
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On 03/13/18 14:52, Gary Aitken wrote:
> Trying to set up samba for the first time (4.7), local file sharing only.
> 
> I have the server set up and can connect / log-on locally using smbclient.
> 
> However, I can't connect from a win7 system;
> with log level set to 2 nothing shows up in /var/log/samba4/log.smbd
> 
> Snooping packets, all I see is:
> (122 is fbsd samba machine; 123 is win7)
> 
> ARP, Request who-has 192.168.151.122 tell 192.168.151.123, length 46
> IP 192.168.151.123.50031 > 192.168.151.122.80: Flags [S], seq 2200471361, win 8192, options [mss 1460,nop,wscale 2,nop,nop,sackOK], length 0
> IP 192.168.151.122.80 > 192.168.151.123.50031: Flags [R.], seq 0, ack 2200471362, win 0, length 0
> IP 192.168.151.123.50031 > 192.168.151.122.80: Flags [S], seq 2200471361, win 8192, options [mss 1460,nop,wscale 2,nop,nop,sackOK], length 0
> IP 192.168.151.122.80 > 192.168.151.123.50031: Flags [R.], seq 0, ack 1, win 0, length 0
> IP 192.168.151.123.50031 > 192.168.151.122.80: Flags [S], seq 2200471361, win 8192, options [mss 1460,nop,nop,sackOK], length 0
> IP 192.168.151.122.80 > 192.168.151.123.50031: Flags [R.], seq 0, ack 1, win 0, length 0
> ARP, Request who-has 192.168.151.112 tell 192.168.151.123, length 46
> 
> Questions:
> 
> Why isn't the fbsd machine replying to the ARP requests?
> Any idea why the win7 machine is hitting port 80?
> Why is port 80 on the fbsd system replying
>     instead of simply dropping the packet?
>    (there's no httpd running)
> 
> pings work both ways.

One additional data point, the win7 system already has an arp entry
for the fbsd machine in its arp table.  Now I'm really confused...