Requests are getting blocked with “network_not_allowed” in Cloud SWG.

Products

• Cloud Secure Web Gateway - Cloud SWG

Issue/Introduction

Requests to specific websites are getting blocked by Cloud SWG with the following exception page;

Cause

By default Cloud SWG blocks the requests to certain IP ranges which are non routable addresses.

Resolution

Request's sent to the following IP segments would be blocked by WSS. There is no way to override this block, to access any of these destinations the IP\domain has to be bypassed from WSS.

Address block	Address range	Description
0.0.0.0/8	0.0.0.0–0.255.255.255	Current network.
10.0.0.0/8	10.0.0.0–10.255.255.255	Used for local communications within a private network.
100.64.0.0/10	100.64.0.0–100.127.255.255	Shared address space[5] for communications between a service provider and its subscribers when using a carrier-grade NAT.
127.0.0.0/8	127.0.0.0–127.255.255.255	Used for loopback addresses to the local host.
169.254.0.0/16	169.254.0.0–169.254.255.255	Used for link-local addresses between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server.
172.16.0.0/12	172.16.0.0–172.31.255.255	Used for local communications within a private network.
192.0.0.0/24	192.0.0.0–192.0.0.255	IETF Protocol Assignments.
192.0.2.0/24	192.0.2.0–192.0.2.255	Assigned as TEST-NET-1, documentation and examples.
192.88.99.0/24	192.88.99.0–192.88.99.255	Reserved. Formerly used for IPv6 to IPv4 relay.
192.168.0.0/16	192.168.0.0–192.168.255.255	Used for local communications within a private network.
198.18.0.0/15	198.18.0.0–198.19.255.255	Used for benchmark testing of inter-network communications between two separate subnets.
198.51.100.0/24	198.51.100.0–198.51.100.255	Assigned as TEST-NET-2, documentation and examples.
203.0.113.0/24	203.0.113.0–203.0.113.255	Assigned as TEST-NET-3, documentation and examples.
224.0.0.0/4	224.0.0.0–239.255.255.255	In use for IP multicast. (Former Class D network.)
240.0.0.0/4	240.0.0.0–255.255.255.254	Reserved for future use. (Former Class E network.)