Hello list,

I have a remote client that needs to use IPv6 virtual addresses but it doesn't want to use a /128 address it requires a /64 IPv6 prefix. This behaviour is defined in RFC6459 <https://tools.ietf.org/html/rfc6459#page-16>. (Strongswan is being used as an ePDG in a 3GPP IMS network)

Is there a configuration I can use that can achieve this? It seems that only a /128 address can be allocated from the address pool.

I have managed to get it to work by adding the rightsubnet to the configuration:

    rightsubnet=  fd59:66df:ba18:5402::/64
    rightsourceip=fd59:66df:ba18:5402::1

but this means I need a different config entry for every client of this type. (BTW: its an iPhone).

I'm going to take a look at the source code but thought I'd ask in case anyone else has faced a similar issue.


Thanks in advance
Alan


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