0
djmanas

Solved Strange network behavior?

Recommended Posts

Hello,

 

I have installed Armbian on my Banana M1+ and I have noticed „something“ strange in network communication. The network connector blinked rapidly even though nothing was running so I have installed iftop and found out this:

 

iftop -i eth0 -NP

Ankh-Morpork => a81.sub72.net78.udm.net
Ankh-Morpork:51413 => a81.sub72.net78.udm.net:57855
Ankh-Morpork => ip70-118.245.80.crimea.com
Ankh-Morpork:51413 => ip70-118.245.80.crimea.com:52026
Ankh-Morpork => adsl-225.37.6.247.tellas.gr
Ankh-Morpork => ip5653f1a5.direct-adsl.nl
Ankh-Morpork:51413 => adsl-225.37.6.247.tellas.gr:29932
Ankh-Morpork:51413 => ip5653f1a5.direct-adsl.nl:6881
 
I am wondering, what are these communications on newly installed system?
 
Thank you,
Regards,
Petr Sourek

Share this post


Link to post
Share on other sites

Ok, sorry guys my bad...

 

On previous „versions“ of Banana M1+ I had bittorrent client to download Debian DVD so I don’t need to let notebook running and for some reason the Apple Airport Express keeps passing the „torrent“ questions back to the banana even though it has been reinstalled „from scratch“ and torrent client is not available. I guess that there is something on the router side than on the linux side of the image.

 

tcpdump:

2016-02-08 11:32:16.038932 IP (tos 0x0, ttl 50, id 48932, offset 0, flags [none], proto UDP (17), length 170)
    broadband-188-32-209-120.nationalcablenetworks.ru.49001 > Ankh.51413: [udp sum ok] UDP, length 142
2016-02-08 11:32:16.039033 IP (tos 0xc0, ttl 64, id 20961, offset 0, flags [none], proto ICMP (1), length 198)
    Ankh > broadband-188-32-209-120.nationalcablenetworks.ru: ICMP Ankh udp port 51413 unreachable, length 178
        IP (tos 0x0, ttl 50, id 48932, offset 0, flags [none], proto UDP (17), length 170)

    broadband-188-32-209-120.nationalcablenetworks.ru.49001 > Ankh.51413: [udp sum ok] UDP, length 142 

 

 

Once again, my bad, sorry :-(

Share this post


Link to post
Share on other sites

After router restart everything is back to normal...

 

192.168.1.110:22           => 192.168.1.20:62546

192.168.1.255:32412     => 192.168.1.100:52036
192.168.1.255:32414     => 192.168.1.100:59061
192.168.1.255:17500     => 192.168.1.20:17500
255.255.255.255:17500 => 192.168.1.20:17500
 
Everything I can see there now is valid according to the running services. Bug report has been filled for apple airport.
 
Sorry guys again.
Regards,
petr Sourek

Share this post


Link to post
Share on other sites

Yeah, I am dumb :-( I have thought, that NAT is enabled as default option, but it seems it is not. I have enabled it.

 

Thank you for pointing out.

Regards,

petr sourek

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
0