Girish Moodalbail wrote:

> Darren Reed wrote:
>
>> Interesting, the use of ipsecconf to manage TCP MD5.
>>
>> Can I specify that my application will use TCP MD5
>> over an IPsec tunnel, all in the same .conf file?
>>   
>
> Well not in the same .conf file. When you have defined a much
> secure IPsec policy between the two end points then having
> TCP MD5 protection between the same two end points is redundant
> and is quite an odd configuration. The IPsec policy overrides the
> TCP MD5 policy as it is more secure.
>
> RFC 2385 was defined to provide protection to BGP traffic using
> TCP MD5. But if you are using IPsec between the end points than
> TCP MD5 will be irrelevant and is not required.
>
> However, you could combine transport mode TCP MD5 and a
> tunnel-mode IPsec. An IPsec policy (ESP and/or AH) will be attached
> to the tunnel and TCP MD5 is applied to the packets near End-host. But
> I don't know why one would do that?


I just wanted to understand what the limitations were on the
two as a result of being configured by the same policy engine.

Darren

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