Just to add my tuppence, when we first started working with FTTC, with the setup we were using the MTU was 1492 and a customer's suresignal that had worked perfectly on ADSL 1500 MTU would not work on FTTC 1492 MTU. When I had a look at the PCAP it showed Vodafone sending packets into the core network at 1500 size, with DF - do not fragment set. What cured it for us was stripping the DF bit, and then mangling the packet to fit 1492. Might be old hat now, hopefully things have moved on, but if you don't have 1500 MTU its worth a check.
Regards Wayne From: uknof [mailto:[email protected]] On Behalf Of Peter Knapp Sent: 04 May 2017 11:37 To: Darren Brown; Paul Bone Cc: [email protected] Subject: Re: [uknof] Vodafone Suresignal Problems We've had this. Took to their customer forum to start with which got me nowhere. Then took to Twitter and referenced the forum. Eventually solved. More recently if you just straight to their forum and post the serial and a traceroute they pick it up really quickly and "resync" your unit. Had to do a couple end of last month. Back on within a couple of hours. Forum.vodafone.co.uk is the place to go. Peter Knapp From: uknof [mailto:[email protected]] On Behalf Of Darren Brown Sent: 04 May 2017 11:10 To: Paul Bone Cc: [email protected] Subject: Re: [uknof] Vodafone Suresignal Problems Im not sure with Sure Signal but i think the TMobile equivalent used to do something clever with MTU / packet size to check you was not VPN'ing back from another country, I suspect if Vodafone do something similar, perhaps you are using PPPOE with a lower MTU and the IPSec tunnel cannot form with the required MTU ? Regards Darren On 4 May 2017, at 09:07, Paul Bone <[email protected]<mailto:[email protected]>> wrote: Is there anyone from Vodafone on this list who could advise on Vodafone Suresignal devices? We have just taken over the internet supply of a site (so changed customers IP addresses) and several users have Vodafone Suresignals which no longer work after the switch. We have not changed their routers just their IP addresses. Vodafone 1st line support just keeps telling the customers that the ISP is blocking their IPsec tunnels which we are not. It looks to me like Vodafone might have some whitelists for these devices but I am speculating! Thanks Best regards, Paul -- Any opinions expressed in this e-mail are those of the individual and not necessarily the Company. This e-mail and any files transmitted with it, including replies and forwarded copies (which may contain alterations) subsequently transmitted from the Company, are confidential and solely for the use of the intended recipient. If you are not the intended recipient of this transmission, please be advised that you have received it in error and that any use is strictly prohibited. If you have received this e-mail in error please notify the Postmaster via e-mail to [email protected]. Citrus Telecommunications Ltd is registered in England and Wales with company No 03517870. Registered address - 99 Holdenhurst Road, Bournemouth, Dorset, BH8 8DY, United Kingdom. Tel: + 44 (0)3451939393.
