I have 2 windows domains connected via site-to-site VPN. Both sites are using ios router 1811. Each site has a MS-exchange server. They need to exchange mails via esmtp. But the ip inspect smtp has dropped pkt.
I have a link from microsoft explaining the symptom.
I removed the inspection for smtp/esmtp for outgoing traffic. It worked straight away. But what does ip inspect really inspect? Does this removal downgrade the security?
I once configured a ftp server behind cisco router. It needs ip inspect ftp to be enabled on incoming traffic to make passitave ftp work.
This ip inspection is a black box. When and how to use it?
Can anybody help?