With the new IPS engine, we have enabled many new rules. Three in particular may cause issues with DNS resolution- they are designed to prevent remote fingerprinting of your internal address space by blocking RFC 1918 IP address DNS responses from leaving the LAN. A great idea unless you are in a routed or VPN environment [;)]
The rules to be aware of are:
15934 DNS dns response for rfc1918 172.16/12 address detected (dns.rules, High)
15935 DNS dns response for rfc1918 192.168/16 address detected (dns.rules, High)
13249 DNS dns response for rfc1918 10/8 address detected (dns.rules, High)
Disabling the offending rule via Network Security > Intrusion Prevention > Advanced tab >Manual rule modification will allow DNS traffic to flow again.
Hello,
this looks like a top tip.
But which rules to disable if the vpn net is standard...
SSL 10.242.2.x
Cisco 10.242.5.x
In my config, both VPNs are not able to browse by name, no dns....
When i type ipconfig /all at the commandoprompt, everything looks fine, but im not able to get a name resolution to any internal servers.
when type ipconfig /registerdns at the prompt, everything works[:S]
With the open vpn client 2.09 everything works without any tricks
I tried disabling the DNS blocking rules 15935 (192.168.0.0/16) and 13249 (10.0.0.0/8), but I'm still not getting a default gateway assignment on my SSL VPN client. Is there another rule that might be blocking this from happening? There is definitely something new in 7.500 that broke my SSL VPN. I can't seem to find a list of all of the IPS rules.
Are you trying to do full tunneling (routing all traffic through the Astaro)?
If so, please try adding the local networks and the "Internet" network to the local networks field, and remove "Any" from the local networks field. Disconnect and reconnect.
Yes, I am trying to do full tunneling (routing all traffic through the Astaro). I assume that you are referring to making the changes above on the SSL VPN configuration area. I made those changes (see screenshot), but I'm still not getting a default gateway on my SSL VPN.
Yes, I am trying to do full tunneling (routing all traffic through the Astaro). I assume that you are referring to making the changes above on the SSL VPN configuration area. I made those changes (see screenshot), but I'm still not getting a default gateway on my SSL VPN.