Quote from: meyergru on January 17, 2026, 09:33:12 AMI would first try if the MTU size is the culprit first (it may also be HTTP/2 over UDP). Use the utility from this post: https://forum.opnsense.org/index.php?topic=45658.0 to find if the 1500 byte MTU is valid from your OpnSenses.
sudo ifconfig
pppoe0: flags=10088d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1492
description: WAN (wan)
options=0
inet REDACTED --> REDACTED netmask 0xffffffff
inet6 fe80::1%pppoe0 prefixlen 64 scopeid 0x27
inet6 fc00:1020:25:28e7::1 prefixlen 64 autoconf pltime 604800 vltime 2592000
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
sudo ./mtu_freebsd.sh 1.1.1.1
Maximum MTU size: 45580sudo ifconfig
pppoe0: flags=10088d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1492
description: WAN_FTTH (wan)
options=100000<NETMAP>
inet REDACTED --> REDACTED netmask 0xffffffff
inet6 fe80::1%pppoe0 prefixlen 64 scopeid 0x7
inet6 fc00:1020:27:5359::1 prefixlen 64 autoconf pltime 604800 vltime 2592000
nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
sudo ./mtu_freebsd.sh 1.1.1.1
Maximum MTU: 25060Quote from: meyergru on January 17, 2026, 09:33:12 AMP.S.: I skip all of the obvious problems, like Realtek adapters, Proxmox underneath with mini jumbo frames, etc. Most of that is covered in the linked article and this one: https://forum.opnsense.org/index.php?topic=44159.0In the following screenshot, the WAN bridge interfaces for both sites are shown (left is the current one, and right is the currently working example):

Quote from: nero355 on January 17, 2026, 11:56:15 PMI think he wants to know what the preferred way is to do that
Quote from: Seimus on January 17, 2026, 01:03:33 PMAlso, PROXMOX e.g linux snapshots and fBSD snapshots are not the same thing. The later is more superior.As fas as I know OpenZFS has become the default for both Linux and *BSD so there is no longer a difference between the two like there was in the past before the merge ?!
Quote from: sopex8260 on January 17, 2026, 11:35:23 AMOn 26.1 in 10 - 15 days... ISC will leave the core opnsense and become a plugin. From there, you can migrate to dnsmasq or KeaI think he wants to know what the preferred way is to do that :
Quote from: +DS_DV+ on January 17, 2026, 11:13:29 AMor is there a planned way from OPNsense for all the existing installations?Since you can't install the plug-in before updating to the version that has ISC as plug-in install option for the first time :)