Hey everyone! I'm in the process of configuring policy-based routing for a branch office. The goal is to make certain types of traffic, like web browsing, appear to come from the head office because some websites are geoblocked in the country. I've got the basic setup working, but I want to make sure that only the intended traffic is routed through the head office. While basic traffic routing is straightforward, many sites utilize CDNs, and if they're not included in the routing rules, all network traffic seems to come from the branch office. Does anyone know of any tools that allow you to input a URL and receive a list of all the other URLs, IPs, domains, and ports that are involved in that transaction? Thanks!
3 Answers
There's really no straightforward tool that can give you a comprehensive list of everything a URL communicates with anymore. Modern websites are complex, often pulling data from multiple CDNs and third-party services, which can make tracking it down a hassle. When I've dealt with similar scenarios, I've used browser dev tools to monitor the Network tab, although it can get noisy. Another effective method is using `tcpdump` or Wireshark on the branch's outgoing traffic while navigating the site. If your firewall supports application-layer inspection, that might also give you a clearer picture. What routing device are you using? Some can simplify this process a lot.
You might want to consider using a proxy server with a PAC file instead of managing this through routing rules; it could be a more efficient solution.
Setting up a proxy at the head office could really help. You can install Firefox at the branch office and configure it to use the head office's proxy. Then, just instruct users to use Chrome or Edge for regular surfing and Firefox for accessing the geoblocked sites. Easy peasy!
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