On 02/20/2015 10:00 AM, Paul Smith wrote:
The truth, Gordon, is that after changing the firewall configuration as described in the referred site, the issue was fixed.
Yes, I understand that. But it sounds like GRE was allowed previously because it was "RELATED" to the pptp TCP connection before a kernel upgrade, but afterward it required a rule to allow it unconditionally (which is bad).
I can't test that because I don't have any PPTP servers available, because PPTP is very bad security-wise.
It would be useful to remove the rules that you added and verify that the PPTP connection fails. Then, boot an older kernel which was known to previously work and test the connection. If it works, then there's a kernel bug that should be reported.
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