foreign ip address on active connection.

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throughwalls
Posts: 89
Joined: Thu Apr 22, 2010 3:24 pm

Re: foreign ip address on active connection.

Post by throughwalls »

I would keep blocking ip addresses you do not want to be accessed.

Which computer is initiating the connections?

coits
Posts: 103
Joined: Thu Sep 19, 2013 1:58 am
Location: canada

Re: foreign ip address on active connection.

Post by coits »

I have tried to block using iptables but to no avail, also use to cat nf_conntrack and grep for that ip address, but no info was returned.

I am now puzzled!!!
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pbix
Developer
Posts: 1366
Joined: Fri Aug 21, 2009 5:09 pm

Re: foreign ip address on active connection.

Post by pbix »

Could be NTP, DHCP or couple of other ligit things. I don't think I would attempt to block it.
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throughwalls
Posts: 89
Joined: Thu Apr 22, 2010 3:24 pm

Re: foreign ip address on active connection.

Post by throughwalls »

Or block away and see what happens.

Which computer on your LAN is initiating the connection?

Expediter
Posts: 2
Joined: Sat Apr 19, 2014 11:23 am

Re: foreign ip address on active connection.

Post by Expediter »

I have the same issue as the OP and I have no idea which machine is initiating it. This is what the connection entry looks like:

udp
142.254.179.173:67 0.000 kBytes
255.255.255.255:68 104.832 kBytes

And from the connected hosts page:

Hostname Host IP Host MAC
(unknown) 142.254.179.173 unknown 0 0 1

coits
Posts: 103
Joined: Thu Sep 19, 2013 1:58 am
Location: canada

Re: foreign ip address on active connection.

Post by coits »

I have no idea who is initiating the connection, all I can see is this info, and 1 udp connection.

(unknown) 96.49.0.1 unknown 0 0 1

I'll need to observe who initiate the connection, to see who's the culprit.

regards
Gargoyle 1.9.x on Buffalo WZR-HP-AG300H
Gargoyle 1.10.x on TP-Link Archer C7 v2.0
Gargoyle 1.11.x on WRT3200 acm

n0pin
Posts: 129
Joined: Thu Jan 09, 2014 6:39 am

Re: foreign ip address on active connection.

Post by n0pin »

DHCP uses ports 67 and 68, so It has probably something to do with assigning IP adresses. Maybe they are used by your ISP to assign you IPs, but I don't know why would they broadcast to entire network (255.255.255.255).

I sometimes observe these connections too, but they all point from private IP address to 255.255.255.255.

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