This usually happens when the traffic through HTTP port 1812 is not allowed.
For example:
[root@iwsva ~]# iptables -nL | grep 1812
[root@iwsva ~]#
You will need to manually add an iptables rule to allow HTTP traffic on port 1812:
[root@iwsva ~]# iptables -I LOCAL_SERV_IN -p tcp --dport 1812 -j ACCEPT
The iptables entry will look as follows:
[root@iwsva ~]# iptables -nL
Chain LOCAL_SERV_IN (1 references)
target prot opt source destination
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:1812
After manually adding the iptables rule, it will be possible to access the IWSVA web console via HTTP on port 1812.