Desde que você descobriu que era o F-Secure impedindo a rede, aqui estão algumas informações sobre como permitir a rede do Windows 7 HomeGroup, o que pode ser suficiente para trabalhar para você como você quer, ou pelo menos apontar para a direita direção ao adicionar a regra de permissão.
De KB da F-Secure :
To set up the F-Secure firewall for your homegroup:
- On the product main page, click Settings > Network connections > Firewall.
- On the Rules tab, click Add. The Add New Rule dialog box opens.
- In the Name field, type Homegroup.
- Select Allow as the rule type and click Next.
- To select the IP address range for this rule, select first the Custom option and then click Edit.
- From the Type drop-down list, select MyNetwork , click Add to list and then OK.
- Click Next.
- Add the following services for the rule by selecting the corresponding check boxes and select the direction of the traffic - both inbound and outbound - by clicking the icon in the Direction column so that a double-headed arrow is visible:
- IGMP/Internet Group Management Protocol
- Windows file sharing and network printers
- Windows network browsing
- SMB over TCP/IP (TCP)
- SMB over TCP/IP (UDP)
- Click Next.
- If you want the alert to be logged or also shown as a pop-up, select either one of the options. In this case, we select the No alert option.
- Click Next. The summary of the rule you are about to create is displayed.
- Click Finish to create the rule.
- On the Firewall page, click the Settings tab.
- In the Select IPv6 traffic filtering options field, select Normal from the drop-down list. This will allow IPv6 traffic to be filtered.
- Click OK.
You are now ready to set up your Windows 7 HomeGroup.