VPN to the Amazon Cloud behind a NAT Device

A customer asked me t ohelp him set up an IPsec tunnel to the Amazon cloud. The set up is described in an article. The Amazon VPN document clearly states that Customer Gateways must have a static IP adress but may be located behind a NAT device. Only NAT-T is not supported. Since the test network of my customer was located behind a NAT device, that we did not control, we just tried to set up the tunnel with a strongswan gateway on our side.

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amavis MILTER HOWTO

Postfix beherrscht seit langem schon das MILTER-Protokoll. Das Protokoll ist mächtiger und feiner zu steuern als der meist angepriesene Ansatz über den smtpd_proxy_filter. In diesem kleinen HOWTO möchte ich zeigen, wie das Content Filter Framework amavisd-new als MILTER in die Mailverarbeitung eingebunden werden kann.

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