Has anyone used the 0.0.0.191 subnet before?
I am looking at the edge router that will connect to the XG firewall.
in the router config i see...
access-list 190 permit ip x.x.x.x 0.0.0.255 x.x.x.x 0.0.0.191
It seems like 0.0.0.191 prevents a network range from getting to the internet.
Does that mean its possible for that network range to have a subnet of 255.255.255.192 but the cisco router is hiding that subnet?
Seems significant the ACLs on the cisco router has the access-list 190 permit ip to most of my vlans.
0.0.0.191 - IP address is in a reserved range.
Google search came up with this...
Private IP Address Ranges Address ranges below are reserved by IANA for private intranets, and not routable to the Internet. For additional information, see RFC 1918.
10.0.0.0 ~ 10.255.255.255 (10.0.0.0/8 prefix) 172.16.0.0 ~ 172.31.255.255 (172.16.0.0/12 prefix) 192.168.0.0 ~ 192.168.255.255 (192.168.0.0/16 prefix)
Reserved and special use addresses:
0.0.0.0/8 - Current network (only valid as source address) RFC 1700 127.0.0.0 is reserved for loopback and IPC on the localhost. 127.0.0.1 ~ 127.255.255.254 (127.0.0.0/8) - loopback IP addresses (refers to self) RFC 5735 192.0.0.0/24 - reserved (IANA) RFC 5735 192.88.99.0/24 - IPv6 to IPv4 relay. RFC 3068 198.18.0.0/15 - network benchmark tests. RFC 2544 198.51.100.0/24 - TEST-NET-2. RFC 5737 203.0.113.0/24 - TEST-NET-3. RFC 5737 224.0.0.0 ~ 239.255.255.255 (224.0.0.0/4) reserved for multicast addresses. RFC 3171 240.0.0.0/4 - reserved (former Class E network) RFC 1700 255.255.255.255 is the limited broadcast address (limited to all other nodes on the LAN) RFC 919 255 in any part of the IP is reserved for broadcast addressing 0.0.0.0 in routing context means the default route (to "the rest of" the internet) RFC 1700 0.0.0.0 in the context of firewalls means "all addresses of the local machine" RFC 1700
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