Merge branch '652-nat-ips' into 'preview'

Resolve "NAT IPs"

Closes #652

See merge request !1168

doc.zih.tu-dresden.de/docs/software/licenses.md

@@ -4,7 +4,7 @@ It is possible (please [contact the support team](../support/support.md) first)
 their own software and use their own license servers, e.g. FlexLM. The outbound IP addresses from
 ZIH systems are:
 
-- NAT via 141.76.3.203 and 141.76.3.204 (for both login and compute nodes)
+- NAT via 141.76.5.48/28 (for both login and compute nodes)
 
 The IT department of the external institute has to open the firewall for license communications
 (might be multiple ports) from ZIH systems and enable handing-out license to these IPs and login.