"Permission denied" using socket with IPv6

[Michael McMahon]

in that case it probably should have worked by using the scope-id as 
part of the
address. So, if address might have been:

InetAddress ia = 
InetAddress.getByName("fe80::20c:29ff:fe98:9210:%eth0"); // or whichever 
interface is required

I've never seen EPERM as an error for that situation before though.

Michael

On 02/06/15 19:52, Bernd Eckenfels wrote:
> Hello,
>
> The reason the IPv6 Stack requires you to specify the interface for a 
> link local address is because such an address has no identifying 
> prefix (since the link local network prefix is the same for all 
> interfaces and therefore the Is no entry in the forwarding information 
> base (routing table).
>
> The EPERM is a rather unfortunate choice for that illegal (missing) 
> argument. In some conditions - (especially older OS kernels) it worked 
> if you had only one global interface.
>
> Gross
> Bernd
>
> Am 02.06.2015 um 17:58 schrieb Bobby Bissett <bbissett at gmail.com 
> <mailto:bbissett at gmail.com>>:
>
>> Whoo-hoo! With these two bits of info and some time with my network 
>> guru, I can finally connect. Info below:
>>
>> On Tue, Jun 2, 2015 at 5:09 AM, Michael McMahon 
>> <michael.x.mcmahon at oracle.com <mailto:michael.x.mcmahon at oracle.com>> 
>> wrote:
>>
>>     Sounds like a native configuration issue all right. The native
>>     connect appears to be getting an EPERM which according to Linux
>>     manpage
>>     could be caused b a local firewall rule
>>
>>
>> On Mon, Jun 1, 2015 at 10:22 PM, Bernd <ecki at zusammenkunft.net 
>> <mailto:ecki at zusammenkunft.net>> wrote:
>>
>>     For a Link-Local Address you might need to define the device
>>     scope with the % suffix. If you cant specify that in your
>>     software, you can use a /etc/host entry.
>>
>>
>> Things weren't working for me despite stopping NetworkManager and 
>> ip6tables, but the combo of stopping those *and* creating a proper 
>> global address for both machines instead of a link-local address 
>> means I can connect fine now. I'm not sure I want to try going back 
>> to the link-local based on info from my network admin.
>>
>> Thanks everyone for the suggestions. Once I wrap my head around what 
>> actually happened (and try this with centos 7 using nmtui) will write 
>> up the details and can share with this list.
>>
>> Thank you again,
>> Bobby
>>

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