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  • SNBForums Code of Conduct

    SNBForums is a community for everyone, no matter what their level of experience.

    Please be tolerant and patient of others, especially newcomers. We are all here to share and learn!

    The rules are simple: Be patient, be nice, be helpful or be gone!

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    Router not getting internet back after WAN drop

    I don't know what options you have with stock firmware, maybe you could adjust https://www.snbforums.com/threads/router-not-getting-internet-back-after-wan-drop.71954/post-709554 to get it work with stock. In my other case I swapped the dhcp binary out from another system (opnsense -> pfsense)...
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    Skynet Which service or process is trying to connect to 87.240.139.194?

    https://www.findip-address.com/87.240.139.194 Locate which process: https://www.nirsoft.net/utils/cports.html
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    4g Carrier-Grade NAT port forwarding, reverse ssh?

    When you have many such devices across the planet you don't have the option to drive by when something falls over :) it needs to be resilient as no ones there to reboot/fix it. I also use keepalive and dns scripts to make sure the ISP is behaving as most don't like unmanned access.
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    Newbie to Merlin/Scripting - SSH script query

    I think so, as I only use asus/merlin with ssh as is supplied where this all works the same, I did once use DB for key generation but quickly moved that to the sshd server. In commercial use (https://www.bitvise.com/ssh-server)
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    4g Carrier-Grade NAT port forwarding, reverse ssh?

    Lets wrap this up in a howto. /jffs/scripts/services-start /jffs/scripts/checkrssh.sh /jffs/scripts/runrssh.sh
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    Newbie to Merlin/Scripting - SSH script query

    https://www.snbforums.com/threads/4g-carrier-grade-nat-port-forwarding-reverse-ssh.64456/
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    Parental control the SH way

    Cron(winscp) is easier to manage than iptables(ssh) and iptables by itself can't translate mac to ip and when the time comes he gets smart about changing mac I'll be 2 steps ahead by using cron :D When it comes to GB on your LAN2WAN, my car can do 260kph but I see no point exceeding 140kph so...
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    USB Connected Printer in Wireless Network

    My 40 euro solution: https://www.snbforums.com/threads/printer-dies-occasionally.42814/page-2#post-693782
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    GPS not working (android)

    I'm sure there's a job waiting for you on Fox News.
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    GPS not working (android)

    This is mainly an android (v4 - v11) problem but also happens on iphones. You can find thousands of threads via google going 15 years back without any one-way solution, blamed on software and hardware 50/50. Personally I've been having this battle as well even going as far to replacing all...
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    Prevent rfc1918 traffic to escape wan interface

    Which reminds me some olden days where pptp(vpn) was using the same subnet on both ends, you either had to fiddle with routing or change your own subnet.
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    Prevent rfc1918 traffic to escape wan interface

    Really?? for example if my ISP uses 10.10.10.* for managing modems and I use the same subnet locally and I can force WAN routing (via for example a faulty vpn, see my remark above) I could for example take over their DHCP server traffic as that subnet is marked as legit.
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    Prevent rfc1918 traffic to escape wan interface

    Hmm, a few weeks ago I had a client which could not get their printer to be found, it had a simple 192.168.1.22 address, a ping and traceroute showed it wanted to go via the WAN address (and then back in) which obviously doesn't work. They did have traces of VPN connections left behind (software...
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    WiFi performance Vs cable

    No disrespect meant but the UK is just a big rock and most stuff is build using the same rock, hence most wires are above ground and you get very solid buildings which last centuries but running cables through it becomes a nightmare.
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    WiFi performance Vs cable

    Keep in mind to use stainless-steal conduits outside or mice and rats will have a field day nibbling away at your cat5/6.
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    NAS for virtualization and full-stack web development/ test environment

    Spend a few bucks and go for a Xeon e5-2630 v4, https://www.intel.com/content/www/us/en/products/sku/92981/intel-xeon-processor-e52630-v4-25m-cache-2-20-ghz/specifications.html
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    Solved MTU Issues

    It depends, for example see this https://www.snbforums.com/threads/optimal-lte-4g-mtu-wan-packet-overhead.74046/ Allas this is a (3g)4g/5g issue and solved between the asus router and the 4g router with a low mtu and dmz to asus. Even an iperf test showed a more stable speed (from the jojo...
  18. I

    Optimal LTE 4G MTU / WAN Packet Overhead

    Not at a low level such as 1300, the 4g overhead varies depending how traffic flows (which can alternate alot in a short time), as it varies the best value is lower then the optimum 4g (or 5g) may have at any given time.
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    Optimal LTE 4G MTU / WAN Packet Overhead

    https://customer.cradlepoint.com/s/article/MTU-MSS-Design-Considerations Here on 4g; ping -f 8.8.8.8 -l 1500 Pinging 8.8.8.8 with 1500 bytes of data: Packet needs to be fragmented but DF set. ping -f 8.8.8.8 -l 1428 Pinging 8.8.8.8 with 1428 bytes of data: Packet needs to be fragmented but DF...
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    I think RT-AC86U seems to have a fatal security vulnerability.

    Then you have two options, 1) move, 2) live without internet. Or 3) stop whining about it.
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