An open discussion list for topics related to the eduGAIN interfederation service.

["Nicholas Roy" <nroy AT internet2.edu>]

On 10 Mar 2020, at 10:21, Davide Vaghetti wrote:

> Hello there,
>
> As some of you might know, lately we had an issue with a more-than 800 
> kbytes inine logo. For example it might be related to metadata loading 
> problems for the SHibboleth SP as reported below:
>
>
> https://shibboleth.1660669.n2.nabble.com/SP-metadata-cache-keeps-growing-td7645484.html#a7645594
>
> Alex Stuart, that is also part of the eduGAIN support team, shared 
> with us some insights on the sizes of inline logos in the eduGAIN 
> metadata.
>
> Alex also anticipated that UKf is planning to filter inline logos 
> bigger than 40/100 KB (not yet clear). So the question is, what do you 
> guys see as a reasonable size for inline logos in eduGAIN?

40KB

Nick

> Cheers,
> Davide
>
> -------- Forwarded Message --------
> Subject: [edugain-support-team] Sizes of inline logos in eduGAIN 
> metadata
> Date: Tue, 10 Mar 2020 09:05:19 +0000
> From: Alex Stuart <Alex.Stuart AT jisc.ac.uk>
> Reply-To: edugain-support-team AT lists.geant.org
> To: edugain-support-team AT lists.geant.org 
> <edugain-support-team AT lists.geant.org>
>
> Dear Colleagues,
>
> At the last support team meeting, Marina asked if we knew the 
> distribution of sizes of inline logos. I've therefore extracted this 
> information from eduGAIN metadata using 
> https://gitlab.com/alexinshandon/logo-distribution. The script outputs 
> the size above a threshold, the entityID, and the 
> registrationAuthority of the federation that registered the entity.
>
> The data below is taken from the eduGAIN aggregate a couple of days 
> ago (after the 800kB logo was removed).
>
> If this kind of data is useful, I can add it to the UK federation's 
> checking framework and set it to run regularly.
>
> And just for information: Ian's writing an import filter for the UK 
> federation to discard logos above a threshold. We've yet to discuss 
> what the threshold is (could be 40kB, maybe 100kB). When we do that, I 
> presume the modified entries will show as WARN messages in the UK 
> federation metadata import logs at 
> https://www.ukfederation.org.uk/fed/edugain-import-log-with-diff.txt
>
> Regards,
> Alex
>
> # size-of-logo  entityID        registrationAuthority
> 161018  https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
> 159718  https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
> 145994  https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
> 118870  https://login.uoc.gr/idp/shibboleth     http://aai.grnet.gr/
> 116578  https://idp.ung.si/idp/20111102 http://aai.arnes.si
> 94618	https://saml1.dmjx.dk/simplesaml/saml2/idp/metadata.php 
> https://www.wayf.dk
> 82066   https://idp.hmu.gr/idp/shibboleth       http://aai.grnet.gr/
> 79626   https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
> 78710   https://idp.aspete.gr/idp/shibboleth    http://aai.grnet.gr/
> 73770   https://login.ntua.gr/idp/shibboleth    http://aai.grnet.gr/
> 72774   https://idp.sc-nm.si/idp/20150127       http://aai.arnes.si
> 63958   https://idp2.dcu.ie/idp/profile/Metadata/SAML   http://www.heanet.ie
> 60642 
> https://proxy.safire.ac.za/birk.php/saml.uwc.ac.za/simplesaml/saml2/idp/metadata.php 
> https://safire.ac.za
> 53602   https://idp3.umt.edu.my/idp/shibboleth  https://sifulan.my
> 52370 
> https://proxy.safire.ac.za/birk.php/idp.wsu.ac.za/simplesaml/saml2/idp/metadata.php 
> https://safire.ac.za
> 49510   https://sso.unisza.edu.my/idp/shibboleth        https://sifulan.my
> 48974   http://auth.msk.dk/adfs/services/trust  https://www.wayf.dk
> 46455   http://fs.ibc.dk/adfs/services/trust    https://www.wayf.dk
> 45970   https://idp.teithe.gr/idp/shibboleth    http://aai.grnet.gr/
> 43830   https://idp.uowm.gr/idp/shibboleth      http://aai.grnet.gr/
> 43106   https://idp.ionio.gr/idp/shibboleth     http://aai.grnet.gr/
> 41435   https://idp.it-tallaght.ie/idp/shibboleth       http://www.heanet.ie
> 41435   https://idp.dit.ie/idp/shibboleth       http://www.heanet.ie
> 41435   https://edugate.itb.ie/idp/shibboleth   http://www.heanet.ie
>
>
> —
> Alex Stuart, Technical Development Manager (Trust and Identity)
> alex.stuart AT jisc.ac.uk