The task of chairing the eduGAIN SG lies within the Operational Team. The SG chair supervises the joining process of new members, sets up consultations, handles voting, keeps the documentation of the process. As a part of the joining process federations are required to provide contact and technical information including sensitive factors such as public keys used for signature verification.
Under the term services listed are utilities as perceived by external users. The internal organisation of services, flow of information and dependencies are not important in this view, but are described in sections further down.
|MDS||https://mds.edugain.org||eduGAIN Metadata Distribution Service (MDS) is the central component of the eduGAIN service as a whole. For the detailed description and procedures used in the eduGAIN metadata aggregate distributed by MDS see [eduGAIN-meta]. The eduGAIN metadata aggregate is produced on a separate, secured host (mds-feed) and it is copied to the distribution hosts and served form there by the http server. The file is updated hourly.|
|The technical site||https://technical.edugain.org||The technical site directed primarily at the federation level personel. It provides information about eduGAIN members, details about their participation. The technical site is also the distribution point of documentation and home for several core and supplementary services.|
|Validator||https://validator.edugain.org||The eduGAIN validator is a service designed for validating metadata adherence. The software has been created primarily as a component of the eduGAIN metadata aggregation and the details of validation rules are given im [eduGAIN-meta]. The same software enriched by a GUI is used a a tool form manual validation of metadata and serves as a support tool for federation operators.|
|eduGAIN status information||This status page provides a view of the eduGAIN database in the part relevant to membership information and to current status of metadata aggregation. The page also displays short summary information about numbers of entities in eduGAIN. The interface provides links to scans of the eduGAIN declaration signed by federations, direct links to metadata validation|
|Entities database GUI||http://technical.edugain.org/enties||This service is an interface to the part of the eduGAIN database which stores information about entities themselves. The interface has many filtering mechanisms and also allows for CSV download for further processing in a spreadsheet.|
|eduGAIN database API||https://technical.edugain.org/api||The API provides access to most of information stored in the database. In particular, the API may be used by the federations to monitor the eduGAIN aggregation process. Other uses are statistics of various sorts or even download membership maps.|
|ECCS||https://technical.edugain.org/eccs/||eduGAIN Connectivity Check Service - monitoring service for IdPs listed in eduGAIN, testing if they are actually ready for eduGAIN - i.e. if they consume eduGAIN metadata|
|isFederated Check||https://technical.edugain.org/isFederatedCheck/||This tool searches all known academic identity federations for matching organisations and then displays the results.|
|Technical testing platform||http://technical-test.edugain.org||This host serves as a playground for software development done by the operational team. All extensions are applied, tested and presented at this platform and then transferred to production using the git mechanism|
|WIKI||The WIKI is maintained as a part of the GEANT WIKI space. The content is provided by many members of the community. WIKI serves as technical documentation, formal documentation (meeting minutes, documentation of operational procedures) and various guides on joining and making most of eduGAIN|
eduGAIN core function is the metadata exchange point. Federations supply their own metadata and download aggregated metadata to supplement their own and redistribute them within their federation members. Federations are strongly discoursed from pointing any of their members directly to the eduGAIN MDS. Within this operational model even a relatively long (several hours) downtime of the MDS does not cause any disruption that could be noticed by individual identity or service providers.
While every care is taken that all eduGAIN services function reliably, the selected operational model allows that services updates and modifications can be done at a short-term notice
|information type||registration level||security level|
federation delegate to eduGAIN SG
|federation delegate deputy to eduGAIN SG||eduGAIN||S|
|federation page URL||eduGAIN||1|
|federation mail contact||eduGAIN||2|
|federation SAML policy URL||SAML||1|
registration practice statement URL
federation SAML metadata aggregate access URL
federation metadata signing key
|registrationAuthority attribute value||SAML||3|
Federation delegate and deputy are the only federation representatives authorized to submit information, therefore their identity needs to be established in a trusted way, this is however part of the global eduGAIN trust model, not specific to the SAML prifile.
|S||special - delegating representatives requires contact with the federation management|
|1||informational, not requiring special vetting|
|2||important contact information|
|3||information of eduGAIN operational relevance, requires special care|
|4||crucial for eduGAIN trust, requires utmost care|
As a principle requirements for federation feeds must be based on either general standards to which eduGAIN SAML profile adheres or on the eduGAIN SAML profile. In the case of standards, the experience shows that certain violations are only discovered when reported by participating federations - not all such violations are reported by standard schema validation tools, ot in fact not all are just schema errors. Whenever a new problem is reported, even if it is in fact a standards violation, it is first raised to the eduGAIN SG. In the same time, eduGAIN OT contacts federations whose metadata feeds cause the problem and points out that the error should be rectified. After the SG has decided that a new requirements should be implemented and a suitable grace period is set, the new validator rule is implemented by the eduGAIN OT, initially as a warning and after the agreed grace period has passed, as an error.
Every rule is documented in the [eduGAIN-meta]
When raising an error, the validator points to the specific rule in [eduGAIN-meta]
Additions to metadata best current practices need to be decided by the eduGAIN SG. Each such good practice needs to needs to be implemented as an eduGAIN validator warning by the eduGAIN OT. Each good practice rule needs to be implemented in [eduGAIN-BCP].
The technical details of the aggregation process are described in [eduGAIN-meta]. Here we only present the operational implementation of this process.
The aggregation, signing and publishing of the eduGAIN metadata aggregate is done on the hourly basis
All information about the system status, federation metadata channel information, federation public keys etc. is kept in the eduGAIN database and taken from there as required within the aggregation process.
Half past every hour metadata acquisition is started on mds-feed and is pefromed in the following steps
mds-feed downloads federation metadata feeds using conditional GET.
if the conditional GET resulted in a download of a new metadata file, such file is passed through the local validator instance, if validation succeeds the downloaded file is used as an input for aggregator if it fails, the previous correct feed copy us used instead
the validated metadata files are passed to a pyFF flow, see also [eduGAIn-meta] Metadata combination and collision handling
pyFF aggregates and then signs the resulting feed; currently the signing is done with key files stored at the mds-feed host
the resulting file is analysed, broken into entities and used to update the edugain-db
the final output is uploaded with sftp to the technical host using a dedicated user account on the the technical host
at 45 minutes past every hour the new copy of eduGAIN metadata aggregate is copied to the final destination directory and when the copy is completed the mv action is performed in order to substitute the production file in an atomic mode
finally the new eduGAIN metadata aggregate file is copied to the history repository and compressed
At midnight (CET) hourly copies of metadata are deleted from the repository, leaving only a single daily file. These daily files can then be used as a source of various data analysis.
As described in [eduGAIN-meta], under certain conditions aggregation alerts are raised. The current practice is that these alerts are sent as e-mails to the eduGAIN OT. Since alerts are relatively rare and federation metadata feeds can be cached for at least 4 days, the eduGAIN OT makes its own decision on how to react to a particular alert. Usually before sending a notification to a federation, the OT waits until the next aggregation run to make sure that the situation has not been rectified by the federation.
If the OT decides that a notification needs to be sent to the federation, the official contact address registered be the given federation is used. If one of the following conditions is met:
then the OT sends additional notifications to the federation delegate and the deputy using their e-mail addresses registered by the given federation.
If it becomes likely that a given federation may not be able to react in time and that its cached metadata feed may expire, the eduGAIN OT sends a warning to the eduGAIN SG mailing list.
It must be realised that that the case of all entities supplied by a large federation being deleted form eduGAIN has heavy consequences - other participating federations will naturally have to drop these entities. When the federation metadata feed becomes available again, other federations may be forced into running emergency regeneration of their metadata, service providers may observe limited breaks in their service. Therefore the eduGAIN OT is making all possible effort to avoid such situations. If the eduGAIN OT realises a very special situation it is allowed to temporarily stop aggregation in order to avoid the deletion of of the federation but ir MUST immediately notify the eduGAIN SG that such measures have been taken.
One example of such a special situation may be a real case of an introduction of a valid but a very short-lived metadata file followed by a metadata error causing a aggregation reject. That situation, leaving no time for normal procedures to take place, was caused by a configuration error on the federation side and was rectified in a short time while the eduGAIN aggregation was suspended.
In the case of an unexpected problem resulting from metadtata aggregation (which may result from an unusual error on a federation side or some software bug in one of the aggregation process steps) the eduGAIN OT has access to hourly copies reaching 24 hours back and to several years of daily copies .
Restoration of snapshots or full virtual machines is possible (and has been performed several times not as disaster recovery but in order to get access to some old files for statistics reasons).
The eduGAIN database is central to all eduGAIN core services. The database stores:
The database is placed on a host separated from the external network, accessible only trough a limited numbers of secure hosts. Database access is realised via dedicated user accounts with access right crafted to minimize the possibility of unauthorized changes.
The database is managed mostly via a web interface secured with access passwords. Modification of data on security levels S, 1, 2 can be done without any additional protection. Management of data with security level 3 is protected with on-time passwords mailed to an external mail account of the managing administrator. Management of data with security level 4 requires direct access to the database host.
For security reasons singing keys can be present only for federations which have been approved to be a member of the eduGAIN SAML Profile.
eduGAIN Metadata Distribution Service (MDS) is the central component of the eduGAIN service as a whole. For the detailed description and procedures used in the eduGAIN metadata aggregate distributed by MDS see [eduGAIN-meta]. The eduGAIN metadata aggregate is produced on a separate, secured host (mds-feed) and the
|Main access host - technical, validator, mds|
All these are CNAMEs for massonia.man.poznan.pl
eduGAIN database - edugain-db
|Function||store all data for services directly managed by the eduGAIN OT|
|The aggregation host - mds-feed|
|Function||acquire and validate federation metadata feeds, create, sign and publish the eduGAIN metadata aggregate.|
The security of the eduGAIN SAML services is essentially the security of the eduGAIN aggregate. This in turn depends on: