# Network Services **URL:** https://community.fastly.com/c/network-services/5.md [Latest](https://community.fastly.com/latest.md) · [Categories](https://community.fastly.com/categories.md) · [Tags](https://community.fastly.com/tags.md) --- ## [About the Network Services category](https://community.fastly.com/t/about-the-network-services-category/24)
**Author:** [@journie.johnson](https://community.fastly.com/u/journie.johnson)\ **Replies:** 0
For discussions related to Fastly’s Content Delivery Network. --- ## [Intermittent TCP RST from Fastly (FRA) for clients that send no TCP timestamps – Vodafone DE (AS3209)](https://community.fastly.com/t/intermittent-tcp-rst-from-fastly-fra-for-clients-that-send-no-tcp-timestamps-vodafone-de-as3209/4526)
**Author:** [@Parakoos](https://community.fastly.com/u/Parakoos)\ **Replies:** 2\ **Last updated:** [October 11, 2026, 7:07pm UTC](https://community.fastly.com/t/intermittent-tcp-rst-from-fastly-fra-for-clients-that-send-no-tcp-timestamps-vodafone-de-as3209/4526 "2026-10-11T19:07:24Z")
Summary From a Windows 11 client on Vodafone Germany cable (AS3209), about 25% of new TCP connections to Fastly addresses get an RST about 20 ms after the client’s first data segment. It happens only when the client’s… --- ## [Docs give two different hit-for-pass TTL ceilings (3690s vs 1 hour)](https://community.fastly.com/t/docs-give-two-different-hit-for-pass-ttl-ceilings-3690s-vs-1-hour/4480)
**Author:** [@zip](https://community.fastly.com/u/zip)\ **Replies:** 0\ **Last updated:** [August 31, 2026, 2:43pm UTC](https://community.fastly.com/t/docs-give-two-different-hit-for-pass-ttl-ceilings-3690s-vs-1-hour/4480 "2026-08-31T14:43:45Z")
Two pairs of documentation pages that disagree with each other. Both are small, but both are the kind of detail you only look up when you’re already debugging something, so having the wrong number is expensive. 1. Hit-f… --- ## [Fastly-specific speed test?](https://community.fastly.com/t/fastly-specific-speed-test/3630)
**Author:** [@voltagex](https://community.fastly.com/u/voltagex)\ **Replies:** 4\ **Last updated:** [August 10, 2026, 3:43pm UTC](https://community.fastly.com/t/fastly-specific-speed-test/3630 "2026-08-10T15:43:12Z")
Hi all, I also sent this to noc@, guess it’s worth posting here too. I’m trying to gather information to send to my ISP - I think Fastly is slower than other CDNs on Launtel. Do you have a speed test or a large file … --- ## [C2PA support enhancements available for all Image Optimizer customers](https://community.fastly.com/t/c2pa-support-enhancements-available-for-all-image-optimizer-customers/4458)
**Author:** [@rbean](https://community.fastly.com/u/rbean)\ **Replies:** 0\ **Last updated:** [August 4, 2026, 3:42pm UTC](https://community.fastly.com/t/c2pa-support-enhancements-available-for-all-image-optimizer-customers/4458 "2026-08-04T15:42:22Z")
Content provenance is gaining momentum for AI-generated images with new laws and regulations popping up and consumer demand for brand trust. To address this, we previously released support for C2PA metadata passthrough … --- ## [HTTP/3 issues with AS1136](https://community.fastly.com/t/http-3-issues-with-as1136/4449)
**Author:** [@r1ch](https://community.fastly.com/u/r1ch)\ **Replies:** 2\ **Last updated:** [July 21, 2026, 7:41pm UTC](https://community.fastly.com/t/http-3-issues-with-as1136/4449 "2026-07-21T19:41:46Z")
Hello, I use KPN NL (AS1136) and sites behind Fastly CDN frequently experience 6-30 sec stalls when accessed via HTTP/3 over IPv6. HTTP/2 works perfectly, so I suspect there is some issue specifically with my ISP and th… --- ## [Guidance on provisioning for d.sni.global.fastly.net (Legacy/Non-SNI Support)](https://community.fastly.com/t/guidance-on-provisioning-for-d-sni-global-fastly-net-legacy-non-sni-support/4407)
**Author:** [@Lead](https://community.fastly.com/u/Lead)\ **Replies:** 1\ **Last updated:** [April 30, 2026, 3:49pm UTC](https://community.fastly.com/t/guidance-on-provisioning-for-d-sni-global-fastly-net-legacy-non-sni-support/4407 "2026-04-30T15:49:17Z")
Hi everyone, I’m currently configuring a service that needs to support legacy, non-SNI clients (primarily older embedded systems and legacy Windows environments).To ensure compatibility, I need to deploy an RSA certific… --- ## [Cannot access Fastly sites from one corporate location](https://community.fastly.com/t/cannot-access-fastly-sites-from-one-corporate-location/4398)
**Author:** [@center](https://community.fastly.com/u/center)\ **Replies:** 1\ **Last updated:** [March 26, 2026, 7:04pm UTC](https://community.fastly.com/t/cannot-access-fastly-sites-from-one-corporate-location/4398 "2026-03-26T19:04:07Z")
We have been unable to access several sites that use Fastly from one of our locations. When attempting to access the sites (https:\\\\www.sfchronicle.com or https:\\\\www.houstonchronicle.com). The page is constantly refresh… --- ## [How to cache everything matching the word](https://community.fastly.com/t/how-to-cache-everything-matching-the-word/4391)
**Author:** [@sujoydhar2k20](https://community.fastly.com/u/sujoydhar2k20)\ **Replies:** 2\ **Last updated:** [March 16, 2026, 5:06pm UTC](https://community.fastly.com/t/how-to-cache-everything-matching-the-word/4391 "2026-03-16T17:06:30Z")
Hi, I am new to this community and trying fastly and I want to cache everything as like user do on cloudflare that matching /product/ will cache forever as the data like pricing and everything is fetched from uncached b… --- ## [Fastly Nameservers does not have IPv6](https://community.fastly.com/t/fastly-nameservers-does-not-have-ipv6/4305)
**Author:** [@miyuru](https://community.fastly.com/u/miyuru)\ **Replies:** 4\ **Last updated:** [February 26, 2026, 6:29am UTC](https://community.fastly.com/t/fastly-nameservers-does-not-have-ipv6/4305 "2026-02-26T06:29:16Z")
And domains like \`files.pythonhosted.org\` cannot be resolved from DNS servers within IPv6 only networks. ns1.fastly.net has address 23.235.32.32 ns2.fastly.net has address 104.156.80.32 ns3.fastly.net has address 23.2… --- ## [Single URL Purge using API](https://community.fastly.com/t/single-url-purge-using-api/4372)
**Author:** [@TomFrey](https://community.fastly.com/u/TomFrey)\ **Replies:** 8\ **Last updated:** [February 17, 2026, 8:20pm UTC](https://community.fastly.com/t/single-url-purge-using-api/4372 "2026-02-17T20:20:00Z")
New to Fastly, and I’m attempting to do a single URL purge. According to the documentation, the URL for this is https://api.fastly.com/purge/{{cached\_url}} Along with the Fastly-Key header. However, when I attempt to … --- ## [How to debug a Client connection issue after hand off to Fastly](https://community.fastly.com/t/how-to-debug-a-client-connection-issue-after-hand-off-to-fastly/4361)
**Author:** [@roffesoft](https://community.fastly.com/u/roffesoft)\ **Replies:** 2\ **Last updated:** [February 5, 2026, 7:28pm UTC](https://community.fastly.com/t/how-to-debug-a-client-connection-issue-after-hand-off-to-fastly/4361 "2026-02-05T19:28:20Z")
I have a customer that has had a new internet connection. After being connected, they reported issues to a number of UK sites, but predominantly issues to www.gov.uk and Companies house. The issue is that an initial bro… --- ## [Slow download speed for 3 weeks now](https://community.fastly.com/t/slow-download-speed-for-3-weeks-now/4315)
**Author:** [@BeepBoop](https://community.fastly.com/u/BeepBoop)\ **Replies:** 1\ **Last updated:** [December 15, 2025, 4:14pm UTC](https://community.fastly.com/t/slow-download-speed-for-3-weeks-now/4315 "2025-12-15T16:14:33Z")
I’m experiencing extremely slow download speeds for sites served by fastly in the evenings (CET). Impacted are sites including Steam, Imgur, GitHub. This is an issue many other Vodafone users reported in the past weeks.… --- ## [Slow downloads from VIE Datacenter](https://community.fastly.com/t/slow-downloads-from-vie-datacenter/3936)
**Author:** [@szyhownica](https://community.fastly.com/u/szyhownica)\ **Replies:** 4\ **Last updated:** [December 9, 2025, 7:20pm UTC](https://community.fastly.com/t/slow-downloads-from-vie-datacenter/3936 "2025-12-09T19:20:05Z")
Good day. I have a problem downloading files that have not been cached from the VIE data center. Sometimes it manages to download part of the file at normal speed, but after a while the speed drops below 1 MB/s. When the… --- ## [Intermittent WebSocket connection failures when routed through Fastly](https://community.fastly.com/t/intermittent-websocket-connection-failures-when-routed-through-fastly/4297)
**Author:** [@Limpanter](https://community.fastly.com/u/Limpanter)\ **Replies:** 1\ **Last updated:** [November 10, 2025, 6:26pm UTC](https://community.fastly.com/t/intermittent-websocket-connection-failures-when-routed-through-fastly/4297 "2025-11-10T18:26:13Z")
Hi community, We’ve encountered an intermittent issue with WebSocket connections when routing traffic through Fastly. The behavior is consistent and reproducible mostly in Google Chrome, while all other browsers (e.g., … --- ## [gRPC connections through Fastly](https://community.fastly.com/t/grpc-connections-through-fastly/3823)
**Author:** [@olivermct](https://community.fastly.com/u/olivermct)\ **Replies:** 5\ **Last updated:** [October 23, 2025, 5:01pm UTC](https://community.fastly.com/t/grpc-connections-through-fastly/3823 "2025-10-23T17:01:44Z")
Is it possible to send gRPC calls through Fastly? I can verify the calls are getting to my backend and making changes but the response comes back as if it failed (server closed the stream without sending trailers). If I … --- ## [Fastly outage? Or have we been banned in Fastly?](https://community.fastly.com/t/fastly-outage-or-have-we-been-banned-in-fastly/4254)
**Author:** [@tomkingfiser](https://community.fastly.com/u/tomkingfiser)\ **Replies:** 1\ **Last updated:** [October 10, 2025, 12:59pm UTC](https://community.fastly.com/t/fastly-outage-or-have-we-been-banned-in-fastly/4254 "2025-10-10T12:59:44Z")
Hi there, Recently our staff have been seeing connection reset errors from a courier company that we use to manage deliveries and because we are unable to access the service it is causing issues. The service is using f… --- ## [Using dictionary for VCL service where data changes frequently?](https://community.fastly.com/t/using-dictionary-for-vcl-service-where-data-changes-frequently/4235)
**Author:** [@shoelessone](https://community.fastly.com/u/shoelessone)\ **Replies:** 2\ **Last updated:** [September 11, 2025, 5:47pm UTC](https://community.fastly.com/t/using-dictionary-for-vcl-service-where-data-changes-frequently/4235 "2025-09-11T17:47:40Z")
Hello! We have a new service we’d like to allow users to opt in (or out) of using. Let’s say we have 5000 customers, and ~5% of them we expect to opt into using this new service. This is something they can configure the… --- ## [Stale content does not seem to work](https://community.fastly.com/t/stale-content-does-not-seem-to-work/4231)
**Author:** [@theo](https://community.fastly.com/u/theo)\ **Replies:** 3\ **Last updated:** [September 9, 2025, 3:30pm UTC](https://community.fastly.com/t/stale-content-does-not-seem-to-work/4231 "2025-09-09T15:30:28Z")
We are testing fastly on the free tier and one of our tests relates to stale content. So I tried these steps: Enable the “Serve stale content on origin failure” option Visit the website and some webpages under it Chec… --- ## [Just Released: VCL Editor Improvements!](https://community.fastly.com/t/just-released-vcl-editor-improvements/4222)
**Author:** [@rbean](https://community.fastly.com/u/rbean)\ **Replies:** 0\ **Last updated:** [August 26, 2025, 5:32pm UTC](https://community.fastly.com/t/just-released-vcl-editor-improvements/4222 "2025-08-26T17:32:35Z")
Available today, we have made the following improvements to our VCL Editor: A modernized code editor for improved usability Full-screen mode for easier viewing and editing A unified view of VCL to simplify workflows T… --- ## [Seatgeek on Shielding, API Protection and Load Testing](https://community.fastly.com/t/seatgeek-on-shielding-api-protection-and-load-testing/4141)
**Author:** [@aspires](https://community.fastly.com/u/aspires)\ **Replies:** 0\ **Last updated:** [July 9, 2025, 5:32pm UTC](https://community.fastly.com/t/seatgeek-on-shielding-api-protection-and-load-testing/4141 "2025-07-09T17:32:13Z")
This post from SeatGeek’s engineering team walks through their usage of Fastly (specifically shielding) and a few other tools, including K6 for load testing their origin architecture. Shielding is one of our most powe… --- ## ["Slow" speed for Fastly in Portugal, with NOS and Vodafone](https://community.fastly.com/t/slow-speed-for-fastly-in-portugal-with-nos-and-vodafone/4108)
**Author:** [@brunoxing](https://community.fastly.com/u/brunoxing)\ **Replies:** 0\ **Last updated:** [June 21, 2025, 9:40pm UTC](https://community.fastly.com/t/slow-speed-for-fastly-in-portugal-with-nos-and-vodafone/4108 "2025-06-21T21:40:22Z")
Hello for all the members and for all the Teams at Fastly, I am an indirect user of the Fastly CDN network, and I am located in Portugal. I have noticed that when I need to download something from Fastly’s network (suc… --- ## [IPv6 routing issue from Vodafone UK to Fastly](https://community.fastly.com/t/ipv6-routing-issue-from-vodafone-uk-to-fastly/4103)
**Author:** [@Rayrob](https://community.fastly.com/u/Rayrob)\ **Replies:** 1\ **Last updated:** [June 21, 2025, 1:41pm UTC](https://community.fastly.com/t/ipv6-routing-issue-from-vodafone-uk-to-fastly/4103 "2025-06-21T13:41:49Z")
For the past 3 days I’ve not been able to reach Fastly hosted sites over IPv6 from Vodafone UK broadband (AS5378) \[2a0a:ef40::/29\]. This had worked fine for the 11 months I’ve had the Vodafone service. IPv4 is working f… --- ## [Beresp.backend.name not set](https://community.fastly.com/t/beresp-backend-name-not-set/4088)
**Author:** [@pkern](https://community.fastly.com/u/pkern)\ **Replies:** 2\ **Last updated:** [June 20, 2025, 3:50pm UTC](https://community.fastly.com/t/beresp-backend-name-not-set/4088 "2025-06-20T15:50:32Z")
The documentation for beresp.backend.name tells me that this variable is preferred if a director is in use. But I always get (null) on it, when logging it from vcl\_log. If I query rep.backend, then I get the director’s n… --- ## [Can't access sites using Fastly from our corporate lan](https://community.fastly.com/t/cant-access-sites-using-fastly-from-our-corporate-lan/4099)
**Author:** [@johnc151](https://community.fastly.com/u/johnc151)\ **Replies:** 4\ **Last updated:** [June 18, 2025, 3:09pm UTC](https://community.fastly.com/t/cant-access-sites-using-fastly-from-our-corporate-lan/4099 "2025-06-18T15:09:04Z")
We’ve been having some issues with access to websites using Fastly, e.g. www.bb.co.uk, www.reddit.com, nytimes, and twitch. Whilst we can ping and traceroute to those sites, in the browser we just don’t get a response at… --- ## [Troubleshooting AS or geolocation issue](https://community.fastly.com/t/troubleshooting-as-or-geolocation-issue/4080)
**Author:** [@cory.goldsboro](https://community.fastly.com/u/cory.goldsboro)\ **Replies:** 1\ **Last updated:** [May 30, 2025, 6:30pm UTC](https://community.fastly.com/t/troubleshooting-as-or-geolocation-issue/4080 "2025-05-30T18:30:34Z")
Hi, I’m with GTT and I’m having an issue with connection to http://ticketweb.ca/. When I attempt to reach it with 208.77.65.22 from 3257 AS I get a message stating browsing activity has been paused. A traceroute from ot… --- ## [Bandwidth fastly](https://community.fastly.com/t/bandwidth-fastly/4030)
**Author:** [@mixserrm999](https://community.fastly.com/u/mixserrm999)\ **Replies:** 4\ **Last updated:** [May 13, 2025, 5:49pm UTC](https://community.fastly.com/t/bandwidth-fastly/4030 "2025-05-13T17:49:35Z")
bandwidth cdn fastly free version is limited to 1gb bandwidth per person right? I use cdn with v2ray xhttp. When I use 1gb, I will be blocked from using cdn of fastly anymore. If I use the paid version, will the 1gb band… --- ## [Unable to Add Domain ‘bee-zh.cn’ to Fastly: Domain Already Owned by Another Customer](https://community.fastly.com/t/unable-to-add-domain-bee-zh-cn-to-fastly-domain-already-owned-by-another-customer/4034)
**Author:** [@mifeng](https://community.fastly.com/u/mifeng)\ **Replies:** 1\ **Last updated:** [May 12, 2025, 4:22pm UTC](https://community.fastly.com/t/unable-to-add-domain-bee-zh-cn-to-fastly-domain-already-owned-by-another-customer/4034 "2025-05-12T16:22:29Z")
I am experiencing an issue while trying to add my domain image.bee-zh.cn to my Fastly account. The system is showing the error message: “Domain ‘bee-zh.cn’ is owned by another customer.”Despite my various attempts, I hav… --- ## [Missing purge logs in Event Log](https://community.fastly.com/t/missing-purge-logs-in-event-log/3888)
**Author:** [@tefkah](https://community.fastly.com/u/tefkah)\ **Replies:** 2\ **Last updated:** [April 21, 2025, 8:04pm UTC](https://community.fastly.com/t/missing-purge-logs-in-event-log/3888 "2025-04-21T20:04:50Z")
Hi there! Recently we have noticed that the “Event Log” when inspecting a service is no longer showing the amount of purges happening in the preceding day, eg for this service it no longer showed that after 15th of Feb … --- ## [Early hints: how to dynamically assign hints in VCL](https://community.fastly.com/t/early-hints-how-to-dynamically-assign-hints-in-vcl/3966)
**Author:** [@emilbjorklund](https://community.fastly.com/u/emilbjorklund)\ **Replies:** 3\ **Last updated:** [April 10, 2025, 1:08pm UTC](https://community.fastly.com/t/early-hints-how-to-dynamically-assign-hints-in-vcl/3966 "2025-04-10T13:08:46Z")
For the Early Hints feature to make sense, I need to update a list of hints every time a deploy happens. For example, a preload URL to a CSS file might change since the content hash was updated. For that purpose, someth… [Next page](https://community.fastly.com/c/network-services/5.md?page=1)