Also, there is an option in the 13.2 (build 34) firmware that allows you
to bump up the NAT table to 8096 (not to mention that you can now watch
it via SNMP).
I'm not doing NAT in the SM.
-----Original Message-----
From: Bill Prince via Af
Sent: Wednesday, October 22, 2014 7:45 PM
To: [email protected]
Subject: Re: [AFMUG] home router max simultaneous connections
A Mikrotik will hold many, many thousands of connections. Don't know
what the limit is, but I have seen tens of thousands of connections in
the connections list.
Also, there is an option in the 13.2 (build 34) firmware that allows you
to bump up the NAT table to 8096 (not to mention that you can now watch
it via SNMP).
bp
On 10/22/2014 5:29 PM, Ken Hohhof via Af wrote:
I have a complaining customer who I’m becoming convinced is exceeding the
NAT connection table in their router. Can I trust the numbers here:
http://www.smallnetbuilder.com/lanwan/router-charts/bar/77-max-simul-conn
This would indicate a mid-range route like a typical N600 probably
supports around 4,000 connections. I'm not sure why this is, if you look
at the RAM specs for any of these routers, it doesn't seem like a
technical limitation, it's almost like they are artificially limiting the
connections by price for marketing reasons. But I think this customer has
something like a Netgear WNDR3400.
Anyway, am I barking up the wrong tree, or is this a possible or even
fairly common situation? I don't see any evidence this customer is doing
Torrents, but there seem to be a lot of TCP connections, and a lot of apps
that seem to have 4-10 or more connections open. Including Pandora, not
sure why Pandora would need so many connections.
Please note, the SM is bridged, I am not doing NAT in the SM.
Is there any way to prove this other than give them a Mikrotik?
And on a Mikrotik, can I tweak the UDP/TCP timeouts to flush out idle
connections faster? Seems like even with infinite memory, there are only
65K possible ports for NAT/PAT and you would run into port exhaustion.
