Group Won’t Accept Mail From ‘Outside’
Jan10

Group Won’t Accept Mail From ‘Outside’

KB ID 0001771 Problem Exchange has been this way for a long time here’s me explaining this very problem with older versions of Exchange. If you create a ‘Group’, be that a Distribution Group, or a ‘Microsoft 365′ Group, the default setting is to NOT ALLOW mail from anyone outside your organisation. If you attempt to send mail to that group you will see errors like these; Errors; 550 5.7.133...

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Cisco ASA – Allow Remote Management
Oct17

Cisco ASA – Allow Remote Management

KB ID 0000173 Problem   Quite a while ago I wrote the “Connecting to and managing Cisco firewalls” article, which is still pretty complete, but I’ve been asked on a few occasions, “How do I actually configure the firewall to allow remote administration via, SSH, or HTTPS/ASDM, or Telnet If you have no network connection to the firewall, then you will need to connect via console cable (CLICK HERE). Solution...

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Juniper SRX Firewall – Allow Web Management from Outside
Nov17

Juniper SRX Firewall – Allow Web Management from Outside

KB ID 0000708  Problem Assuming you already have web management enabled, and you want to access it from the outside (the untrusted zone). Solution 1. Log into the web console of the Juniper. 2. Navigate to Security > Zones/Screen > Select the ‘Untrust’ Zone > Edit > Host inbound traffic – Interface > Select the Outside interface > Under Interface services add in ‘http’ > OK. 3. Then...

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Enable DNS Lookup on the Cisco PIXASA
Nov17

Enable DNS Lookup on the Cisco PIXASA

KB ID 0000029  Problem You need the ASA to be able to resolve external hostname’s. Note: You need at least version 8.2(2) before you can use a DNS name in an access-list. Solution Note: In this example I’m using 122.122.122.199 and 122.122.122.198 (yes, they cannot exist!) as the external DNS addresses, substitute your own.</p? 1. Whilst in enable mode > enter configure terminal mode, then enable DNS Lookups....

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Cisco ASA 5500 – Throttling (Rate Limiting) Traffic
Nov17

Cisco ASA 5500 – Throttling (Rate Limiting) Traffic

KB ID 0001001  Problem If you have one client that’s taking all your bandwidth, or a server that’s getting a lot of connections from external IP addresses, and that’s causing you performance problems, you can ‘throttle’ traffic from/to that client by ‘policing’ its traffic. Solution To demonstrate, I have a 30Mb connection at home, when I run a test on the download connection speed from my...

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