MatthewShaw

Thanks, I've been so focused on routing/ALG I didn't consider packet sizing.

This could be either an ISP issue of an issue with our phone provider, my guess it's the former. I was wondering if anyone else has experience of the problem. We have several schools using Talk-Straight as their ISP, Talk-Straight have a single VDOM that covers the trust. All was working fine until Tuesday, on Monday evening a new school joined the VDOM, since then niether the new school nor one other school have had consistent phone service. The two schools that have issues both have an onsite PBX running 3CX, other schools are running cloud hosted 3CX and are not affected. The 2 affected school experience the same issue, incoming and local calls work, external calls ring but don't connect. We have tried everything and now have a work-arround which involces routing calls to an external provider. Has anyone else had this wissue with Talk-Straight and 3CX, was it resolved? and if so how? Thanks

Hi. After working with the ISP on Friday we found some errors on the line. We didn't delve very deeply into the the TLS errors as we're only using them as an indicator to give Smoothwall and the ISP a pointer. As it stands we still haven't rules out Smoothwall nor the ISP and have further testign scheduled for Monday which will give us a bit more clarity as it could still an issue with the inTune build process being filtered by Smoothwall (I thought this was rulled out until a passing comment from our contractor). I'll come back to the thread after that To answer your question though, the odd thing is, we get TLS errors on everything behind Smoothwall and everything when we connect directly to the ISP. However if I connect to the old Smoothwall everything works, if I connect directly to the ISP via the same public IP as the old smoothwall we get TSL errors??? - the assumption here is that the old Smoothwall is doing some traffic shaping to fix an issue with the ISP.

Thanks. Everything works offsite. We're currently in discussions with our ISP as testfiltering.com throws errors when we plug directly into the router, the ISP claims there is no firewall configured (exponential-e), the issues look to be TLS related.

Hi, Hoping someone can help as this is driving us mad. We have migrated our network over the summer from a traditional onprem set up to AD linked to M365/Intune/Entra. Deices are not AD linked. We run a Smoothwall VM for Firewall and filtering. We have an issue where a majority of students logins take around 10 minuets and some of them when they do log in have a blank screen. Some students seem to login without issues.The company that has delivered the migration are blaming Smoothwall and Smoothwall are blaming them. Leaving us stuck in the middle with our student devices effectively useless. Has anyone experienced similar issue or can anyone give any pointers on what to look at? as always any advice is really appreciated. Many thanks