Hi folks
About a week ago Frontier replaced my old ActionTec MOCA router with a NVG468MQ Ethernet based one. I am now experiencing an issue I did not have with the old router.
I have a few inbound port forwarding rules set up. They work fine when connecting from outside, to a DDNS-configured hostname. However, if I connect from inside via the external IP address of the router, only some connection attempt works; the others time-out. For example, here is a series of tests connecting from outside in rapid succession, all successful:
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
Connected to test.synology.me.
Escape character is '^]'.
Connection closed by foreign host.
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
Connected to test.synology.me.
Escape character is '^]'.
Connection closed by foreign host.
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
Connected to test.synology.me.
Escape character is '^]'.
Connection closed by foreign host.
But from an internal host, many time out (I just killed them with Ctrl-C below):
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
Connected to test.synology.me.
Escape character is '^]'.
Connection closed by foreign host.
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
^C
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
^C
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
^C
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
^C
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
^C
➜ ~ telnet test.synology.me
Trying 50.34.81.49...
Connected to test.synology.me.
Escape character is '^]'.
^CConnection closed by foreign host.
It's as if it will only allow a single connection from its own WAN IP address back to itself, and there is a delay in cleaning that up during which the following attempts are blocked (I'd put it at around 30 seconds before I can successfully connect again).
This is really annoying as I use the DDNS hostname so that I can connect whether at home or away to some services on my server. The old router handled this fine.
So, questions:
- is there an explanation for this, and is there a fix/workaround?
- if not, can I toss this router and use my own? I have an unused Asus AC68U lying around I could repurpose.
Thanks!
Graham
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