From which PIX OS version is it possible to assign a /31 address mask to an interface? In version 6.3(4) if I try to assign an IP with subnet mask 255.255.255.254 I get the error:
"Warning : IP and subnetmask form invalid pair indicating broadcast address"
I have seen a /31 mask assigned in PIX OS version 7.0 so I know it is possible. Anyone ever used one in version 6.XX ? I really need to use a /31 address because we have exhausted our company's public IPs.
Re: PIX IP address assignment problem version 6.3(4)
My addressing is:
xxx.xxx.xxx.228 255.255.255.254 Router
xxx.xxx.xxx.229 255.255.255.254 PIX
I am aware of the IOS feature being available from version 12.2 onwards. I just could not find any documentation about PIX OS. There is an indirect reference to this limitation in Management Center for Firewalls ver 1.3.2 (part of the CiscoWorks VPN suite):
So there is no definite answer about versions 6.3.4 and 6.3.5. I already verified that in version 6.3.4 /31 netmasks are not supported so my guess is that most probably they are not supported also in version 6.3.5
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...