Can you elaborate?
It is my understanding that typically, routers rewrite OSI-L2 and OSI-L3 of any traffic - TCP or UDP?
Because this is what routers are designed for - is it not...?
Mmm... I still don't understand the reasoning...
Why is the router sending zero-win's to devices on the internet? Usually this only happens if these devices are sending to much packets in one go => not enough memory for storing these packets before they are processed? While memory usage is less...
I don't understand.
The clients are NAT-ed. Meaning packets before and after the router are different on OSI-L2 and OSI-L3 => once on the WAN-side of the Asus router, there is nothing that points to a certain client - let alone the client IP.
Please advise - how do I compare? What should I look...
Perhaps - but the same Allegro Packet setup applies to the LAN-side of the router (this time as a VM with the same capabilities). Within that, there are no zero-win packets; not from the client and not from the server => the "problem" must be on the Asus router itself.
With a packet-analyzer-on-steroids (aka Allegro 500 from Allegro Packets) connected to a network tap. This network tap is connected between the WAN-port of the router and the LAN-port of the ISP-modem.
The Allegro 500 is configured in a way that an alert is sent each time a zero-win packet is...
Team,
For performance reasons I'm tracking Zero-win packets (among a few other things).
To make sure everybody is on the same page: a zero-win packet indicates that its sender is suffering from a lack of resources; one way or the other.
I'm running Merlin version 386.1_2 on an Asus RT-AC68U...
Thank you for the feedback.
Indeed - the first step is validating if it is a real vulnerability.
And yes - I'm aware of the fact that the router is not running php and isn't a phone.
Thinking out load now:
If I do some research on the presented "vulnerabilities" then it seems to be related to...
See also attached screenshot:
This is the result of a vulnerability scan of an Asus rt-ac68u with the latest Merlin firmware.
This is done without any interactive logins => only portscanning.
This router is not reachable via the internet
While it looks worse then it really is due to the...
Got things working now.
In the end, the content of the log put me in the wrong direction.
One reason was because of the timestamps => the router wasn't sync-ed with ntp.
The other was the content of /tmp: as opposed to Ubuntu, it looks as if this folder is not cleared on a warm boot; only on a...
Thanks everybody for the feedback.
I have changed things to the extend that:
- the dnsmasq.conf is renamed to dnsmasq.conf.add
- in it, any entries pointing the previous folders and/or interfaces are either renamed or removed
- the conf-files starting with static are now in /jffs/configs as...
I'm struggling with dnsmasq and a custom config.
What I'm trying to accomplish:
Porting a working dnsmasq install/config from Ubuntu to Merlin.
On Ubuntu there are 3 config files: dnsmasq.conf, static-hosts.conf and static-dhcp-hosts.conf (attached in zip).
The file static-hosts contains a...