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monaro
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Posts: 33
Joined: Wed Feb 07, 2007 10:05 pm

Port 5678 UDP

Mon Nov 12, 2007 3:58 pm

I have a PC with firewalled. I kept receiving attack from MT using port 5678 UDP. I don't know wether coming from users under LAN or wat.

Does anyone know what port 5678 UDP used for.

Cheers
 
R1CH
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Posts: 949
Joined: Sun Oct 01, 2006 11:44 pm

Re: Port 5678 UDP

Mon Nov 12, 2007 4:24 pm

It's coming from RouterOS, the neighbor discovery feature. You can turn it off in IP / Neighbors / Discovery Interfaces if it bothers you.
 
monaro
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Posts: 33
Joined: Wed Feb 07, 2007 10:05 pm

Re: Port 5678 UDP

Mon Nov 12, 2007 4:52 pm

It's coming from RouterOS, the neighbor discovery feature. You can turn it off in IP / Neighbors / Discovery Interfaces if it bothers you.
Thanxxx!!! It works :D
 
geom007
just joined
Posts: 9
Joined: Sat May 17, 2014 4:05 am

Re: Port 5678 UDP

Sat May 31, 2014 2:38 am

It seems, command
/ ip neighbor discovery set <interface> discover="no"
will disable neighbor discovery broadcasts for ipv6 also.
 
mark1234
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Joined: Wed Oct 26, 2011 10:31 pm

Re: Port 5678 UDP

Wed Apr 08, 2015 9:59 pm

Thanks! I also saw outgoing UDP packets on port 5678 in logfile.

When I disabled it on my LAN ports I saw that this neighbour-discovery is disabled on ether1 per default (default WAN port).

I use ether5 as WAN port - are there some other "hidden" settings like this which should be disabled when I use any other port than ether1 as WAN port?
 
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ZeroByte
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Re: Port 5678 UDP

Thu Apr 09, 2015 12:42 am

Just remember that with neighbor discovery turned off, you won't see the Mikrotik from winbox when you hit the [...] discovery button. (Just an FYI, not saying 'only fools do this') You can still type in the MAC address manually if you ever break the IP configuration of the box.

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