I have a pair of Cisco ASAs running in active/standby failover mode which I manage using the management interface. Lately, I frequently have to travel and the VPN to the university's LAN has different IP subnet from the ASA management interface. So, I cannot access the management interface when using different IP subnet.
My understanding is this is due to asymmetric routing issue and the only way to overcome this is by using multiple context mode.
Right now, I am not clear about the changes of configuration to be made on ASAs. The ASA uses EIGRP.
Note: The pair of ASAs that I am responsible to are not the firewall for entire university campus, just for a single network which contains freenas servers for a few researchers. The VPN gateway is at different firewall and managed by official IT team.