file sharing, screen sharing printer sharing

[Tim]

On Fri, 2015-10-23 at 07:35 +0200, Antonio M wrote:
> and then I digget the machines from themselves
> --------------------------------------------------------------------------------------------------------------------------
> dig -x 192.168.1.3
> 
> ; <<>> DiG 9.10.2-P4-RedHat-9.10.2-5.P4.fc22 <<>> -x 192.168.1.3
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55967
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
> 
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;3.1.168.192.in-addr.arpa.    IN    PTR
> 
> ;; AUTHORITY SECTION:
> 168.192.IN-ADDR.ARPA.    86400    IN    SOA    168.192.IN-ADDR.ARPA. . 0
> 28800 7200 604800 86400
> 
> ;; Query time: 14 msec
> ;; SERVER: 192.168.1.1#53(192.168.1.1)
> ;; WHEN: ven ott 23 07:29:39 CEST 2015
> ;; MSG SIZE  rcvd: 108

That query went un-answered.  The answer would be after the QUESTION
section.  The server it asked (192.168.1.1) didn't have any data to give
back to the query.


> ---------------------------------------------------------------------------------------------------------------------
>  dig -x 192.168.1.69
> ;; Warning: Message parser reports malformed message packet.

The malformed warning doesn't sound good.

> ; <<>> DiG 9.10.2-P4-RedHat-9.10.2-5.P4.fc22 <<>> -x 192.168.1.69
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39386
> ;; flags: qr aa rd ra ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
> 
> ;; QUESTION SECTION:
> ;69.1.168.192.in-addr.arpa.    IN    PTR
> 
> ;; ANSWER SECTION:
> 69.1.168.192.in-addr.arpa. 0    IN    PTR
> Fujiantonio.homenet.telecomitalia.it.
> 
> ;; Query time: 628 msec
> ;; SERVER: 192.168.1.1#53(192.168.1.1)
> ;; WHEN: ven ott 23 07:27:47 CEST 2015
> ;; MSG SIZE  rcvd: 93

That one did have an answer:  Fujiantonio.homenet.telecomitalia.it.

And if DNS is fully working, doing a dig against the name, should come
back with the same IP.

Is that a domain that you own, or has the query gone through to your
ISP?  (If 192.168.1.1 didn't know the answer, it can ask further up the
chain.)

If I do a "dig telecomitalia.it" I get a public IP.  If you're
shoehorning your LAN into your ISP's domain name, or anybody else's
domain name, you're likely to strike problems.




> -------------------------------------------------------------------------------------------------------
> digging from laptop to pcdesktop1:
> 
> [antonio at Fujiantonio ~]$ dig -x 192.168.1.3
> 
> ; <<>> DiG 9.10.2-P4-RedHat-9.10.2-5.P4.fc22 <<>> -x 192.168.1.3
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7666
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
> 
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;3.1.168.192.in-addr.arpa.    IN    PTR
> 
> ;; AUTHORITY SECTION:
> 168.192.IN-ADDR.ARPA.    86400    IN    SOA    168.192.IN-ADDR.ARPA. . 0
> 28800 7200 604800 86400
> 
> ;; Query time: 14 msec
> ;; SERVER: 192.168.1.1#53(192.168.1.1)
> ;; WHEN: ven ott 23 07:32:55 CEST 2015
> ;; MSG SIZE  rcvd: 108
> ------------------------------------------------------------------------------------------------------------------------------

Again, no answer was forthcoming from that DNS server.  It won't really
matter where you do the query from (the same PC as the server, or over
your LAN).

What's 192.168.1.1?  A computer or a router?


-- 
tim at localhost ~]$ uname -rsvp

Linux 3.19.8-100.fc20.i686 #1 SMP Tue May 12 17:42:35 UTC 2015 i686

All mail to my mailbox is automatically deleted, there is no point trying
to privately email me, I will only read messages posted to the public lists.

George Orwell's '1984' was supposed to be a warning against tyranny, not
a set of instructions for supposedly democratic governments.