Hi Long time user of Tomato, I recently upgraded to the latest version 115 of AdvancedTomato (tomato-K26USB-1.28.AT-RT-MIPSR2-1.15.14-Big-VPN.trx) from 114 Shibby (non AT). Since the upgrade, I experienced random reboots occurring mainly 1 time per day (but I did have a day with 4 or 5 reboots). First thing done, I did a full NVRAM reset and reconfigured all settings manually (full config at bottom of post). Nothing change, still getting random reboots almost every 24 hours + ~1-4 hours. As It was not working, I switched to the standard Shibby version (tomato-K26USB-1.28.RT-MIPSR2-115-Big-VPN.trx). I did a full NVRAM reset again and reconfigured all. Same thing. As this was getting weird, I enabled logging on an USB flash drive but I did not get any useful log. The log just stop when the router reboots and after that, I get only the standard boot log... Finally, I switched to Toastman (tomato-K26USB-1.28.7503.5MIPSR2Toastman-RT-Std), NVRAM reset, redid all my settings. No reboot since. FULL CONFIG (if nothing is indicated for a particular setting, assume default) : Hardware : WNR3500L v1 (64 MB of RAM/8 MB of Flash) Network WAN DHCP Network Router IP 10.10.10.10 Netmask 255.255.255.0 Local DHCP Enabled IP Range 10.10.10.200 - 240 (lease 1440m) Static DNS is customized (1 ISP, 1 Google, 1 Other) Enable Ports States: all options checked Wireless Enabled AP mode - N Only SSID (simple letter only name) Broadcast is enabled Channel is 6 with width 20 Mhz Security is WPA2 Personal AES Shared key is alphanumeric with no special character IPv6 (I did have a tunnel at start but for all my tests, I did not enabled IPv6 at all) Identification : router name, hostname and domain name are customized Time: UTC+1, Auto daylight enabled, update every 4 hours, servers are Europe DDNS: enabled, use WAN IP, refresh every 28 days, service is Custom URL Static DHCP and ARP: 3 static DHCP are configured (10.10.10.101, 10.10.10.1, 10.10.10.2) Advanced Conntrack NetFilter Maximum Connections 16384 (did revert to default too, same) Hash Table Size 16384 (did revert to default too, same) Tracking / NAT Helpers are all DISABLED Inbound Layer 7 is DISABLED Advanced DHCP Prevent DNS rebind attacks ENABLED Intercept DNS port ENABLED Custom DNSMASQ: no-negcache strict-order Advanced Firewall Respond to ICMP Ping ENABLED LIMIT PPS ENABLED NAT Loopback ALL NAT Target MASQUERADE Advanced Wireless Country FRANCE Transmit Power 0 APSD Mobe Enabled (did revert to default too, same) Forwarding 4 simple entries: TCP (6690), UDP(500,4500), UDP (1194), Both (27015) UPnP is ENABLED NAT-PMP is DISABLED Inactive rules cleaning is ENABLED Secure Mode is ENABLED Listen on LAN 1 USB Support (I have an USB flash drive plugged constantly) USB 2.0 only FS Support Ext2/Ext3 + FAT Bandwidth Monitoring (did revert to default too, same) Save history location Custom Path on USB drive mount Frequency 2 days Router script INIT : modprobe bcm_nat (did try without too, no effect and I believe It's ON by default on Toastman and it's working fine).