Filter To Unblock
Updated 11/12/2026
Thanks to GEDER for this complete list
Skytek Desk:
skytekdesk.com
cdn.skytek-sites.com
skytektel-audio.s3.us-east-2.amazonaws.com
skytektel-audio.s3.amazonaws.com
skytektel-audio.*.amazonaws.com/*
reachuc-media.s3.amazonaws.com
phone.skytektel.com
referrer skytekdesk.com image
Signing in and connecting accounts:
accounts.google.com
login.microsoftonline.com
appleid.apple.com
www.dropbox.com
appcenter.intuit.com
connect.facebook.net
*.facebook.com
apis.google.com
docs.google.com
onedrive.live.com
*.sharepoint.com
Page styling and pictures:
fonts.googleapis.com
fonts.gstatic.com
lh3.googleusercontent.com
www.google.com
ssl.gstatic.com
Older Skytek Desk pages:
cdn.jsdelivr.net
cdnjs.cloudflare.com
code.jquery.com
unpkg.com
cdn.tailwindcss.com
Maps and addresses:
maps.googleapis.com
maps.gstatic.com
Payments:
cdn.plaid.com
hpp.ippay.com
cdn.cardknox.com
Public forms:
challenges.cloudflare.com
Realty photos:
skytek-realty-photos.s3.us-east-2.amazonaws.com
Video and voice:
player.vimeo.com
youtube.com
youtube-nocookie.com
huggingface.co
Calls and meetings in the browser:
23625-proxy.reachuc.com · port 9002
stun.l.google.com · port UDP 19302
stun1.l.google.com · port UDP 19302
meet.skytekdesk.com · port 443, UDP 10000
Browser notifications:
fcm.googleapis.com
updates.push.services.mozilla.com
web.push.apple.com
Skytek Desk phone apps:
relay.skytekdesk.com · port 7443
u.expo.dev · port 443
*.push.apple.com · port 5223, 443
mtalk.google.com · port 5228
fcm.googleapis.com
firebaseinstallations.googleapis.com
sipcfg.io · port 80
*.outboundproxy.com
Phone system app (ConnectUC):
uc-technologies.com
app.connectuc.io
connectuc.io · port 443
reachuc.com · port 9002
chime.aws
messaging-chime.*.amazonaws.com
*.gravatar.com
stackpath.bootstrapcdn.com
skytektel.com
portal.skytektel.com
api.skyswitch.com
pbx.skyswitch.com
https://connectuc-releases.s3.us-east-1.amazonaws.com/desktop-prod/latest/ConnectUC.exe
https://connectuc-releases.s3.us-east-1.amazonaws.com/desktop-prod/latest/ConnectUC.dmg
https://connectuc-releases.s3.us-east-1.amazonaws.com/desktop-prod/latest/ConnectUC.msi
Addresses and ports:
99.77.128.0/18
8000,8001
—
Pictures inside emails synced into Skytek Desk load from each sender's own website, so they cannot be listed here. If your filter blocks a picture in an email, it is that sender's address it is blocking.
For single URLs, see below.
URL & Port Configuration
Click any Copy button to quickly copy URLs or configurations to your clipboard.
Skytek Desk
The app itself, its files, and the pictures and recordings inside it. These addresses must be allowed in full, with no content scanning or page inspection: a filter that inspects them puts its own page in place of Skytek Desk's answers, and its screens stop loading.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| skytekdesk.com | Skytek Desk itself, and its live updates | ||||
| cdn.skytek-sites.com | Images and files in Skytek Desk and Skytek Sites | ||||
| skytektel-audio.s3.us-east-2.amazonaws.com | Voicemail and call-recording playback | ||||
| skytektel-audio.s3.amazonaws.com | Audio files (older links) | ||||
| skytektel-audio.*.amazonaws.com/* | Pictures in text messages (MMS) | ||||
| reachuc-media.s3.amazonaws.com | Pictures in text messages sent through the phone network (MMS) | ||||
| phone.skytektel.com | The phone-system portal Skytek Desk opens | ||||
| referrer skytekdesk.com image | Stops the filter painting over pictures in text messages |
Signing in and connecting accounts
Sign-in pages and the accounts a customer connects to Skytek Desk.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| accounts.google.com | Sign in with Google; connecting Gmail, Google Calendar and Drive | ||||
| login.microsoftonline.com | Connecting an Outlook or Microsoft 365 mailbox and OneDrive | ||||
| appleid.apple.com | Connecting Apple (iCloud) contacts | ||||
| www.dropbox.com | Connecting Dropbox | ||||
| appcenter.intuit.com | Connecting QuickBooks | ||||
| connect.facebook.net | Connecting WhatsApp (Facebook's sign-in script) | ||||
| *.facebook.com | Connecting WhatsApp (Facebook's sign-in window) | ||||
| apis.google.com | Choosing files from Google Drive (Google's file picker) | ||||
| docs.google.com | Google's file picker window, and Google Sheets and Docs a customer links | ||||
| onedrive.live.com | Choosing files from a personal OneDrive | ||||
| *.sharepoint.com | Choosing files from a work or school OneDrive |
Page styling and pictures
Fonts, icons and the small pictures beside contacts and companies.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| fonts.googleapis.com | Page fonts | ||||
| fonts.gstatic.com | Page fonts and icons | ||||
| lh3.googleusercontent.com | Profile pictures of people signed in with Google | ||||
| www.google.com | Company logos beside contacts and companies (www.google.com/s2/favicons) | ||||
| ssl.gstatic.com | Mail-provider marks (Gmail and others) in the inbox |
Older Skytek Desk pages
Scripts and styles a few of the older settings pages load.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| cdn.jsdelivr.net | Scripts and styles on older pages | ||||
| cdnjs.cloudflare.com | Scripts and styles on older pages | ||||
| code.jquery.com | Scripts on older pages | ||||
| unpkg.com | Scripts on older pages | ||||
| cdn.tailwindcss.com | Styling for the Deskmate pop-out window |
Maps and addresses
Address look-up and maps (Realty, contacts, field sales).
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| maps.googleapis.com | Address autocomplete and maps | ||||
| maps.gstatic.com | Map pictures |
Payments
Card readers, card forms and bank connections.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| cdn.plaid.com | Connecting a bank account (Plaid) | ||||
| hpp.ippay.com | Card payment pages (IPPay) | ||||
| cdn.cardknox.com | Card forms at the counter and on the customer portal (Sola / Cardknox) |
Public forms
The check that keeps robots off forms a business publishes.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| challenges.cloudflare.com | The "are you a person" check on public forms |
Realty photos
Listing photos. The audio address above does not cover this one.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| skytek-realty-photos.s3.us-east-2.amazonaws.com | Listing and property photos |
Video and voice
Help videos, videos placed on pages, and the voice that reads text aloud.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| player.vimeo.com | Help and demo videos | ||||
| youtube.com | Videos placed on pages (and www.youtube.com) | ||||
| youtube-nocookie.com | Videos placed on pages (and www.youtube-nocookie.com) | ||||
| huggingface.co | The read-aloud voice, downloaded once the first time it speaks |
Calls and meetings in the browser
The phone inside Skytek Desk and video meetings. These use ports other than the usual web port.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| 23625-proxy.reachuc.com | 9002 | Calls on the phone inside Skytek Desk (secure WebSocket) | |||
| stun.l.google.com | UDP 19302 | Connecting the sound of a call in the browser | |||
| stun1.l.google.com | UDP 19302 | Connecting the sound of a call in the browser (backup) | |||
| meet.skytekdesk.com | 443, UDP 10000 | Video meetings — sound and picture |
Browser notifications
Pop-up notices for new calls, texts and messages, by browser.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| fcm.googleapis.com | Notifications in Chrome and Edge | ||||
| updates.push.services.mozilla.com | Notifications in Firefox | ||||
| web.push.apple.com | Notifications in Safari |
Skytek Desk phone apps
The Skytek Desk app on phones, and phones that ring straight from the phone system.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| relay.skytekdesk.com | 7443 | Calls on the Skytek Desk phone app (secure WebSocket). If blocked or held, calls are missed | |||
| u.expo.dev | 443 | Skytek Desk phone app updates | |||
| *.push.apple.com | 5223, 443 | Notifications on iPhone | |||
| mtalk.google.com | 5228 | Notifications on Android | |||
| fcm.googleapis.com | Notifications on Android | ||||
| firebaseinstallations.googleapis.com | Notifications on Android (sign-up) | ||||
| sipcfg.io | 80 | Yealink desk phones fetching their setup when first plugged in | |||
| *.outboundproxy.com | Calls on phones that register straight to the phone system (kosher phones, desk phones); allow every address under outboundproxy.com |
Phone system app (ConnectUC)
Only for customers who use the ConnectUC app. For the ConnectUC desktop (Electron) app, turn proxy SSL off.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| uc-technologies.com | Signing in to ConnectUC | ||||
| app.connectuc.io | The ConnectUC calling app | ||||
| connectuc.io | 443 | The ConnectUC calling app | |||
| reachuc.com | 9002 | Required for the ConnectUC SDK | |||
| chime.aws | Text messages in ConnectUC. For Netfree, if chime.aws can't be opened, *.ws-messaging.chime.aws must be opened | ||||
| messaging-chime.*.amazonaws.com | Text messages in ConnectUC | ||||
| *.gravatar.com | Contact pictures in ConnectUC — without it, contacts and texts lag | ||||
| stackpath.bootstrapcdn.com | The phone-system portal | ||||
| skytektel.com | The phone-system portal | ||||
| portal.skytektel.com | The phone-system portal (picture filter override) | ||||
| api.skyswitch.com | The phone system | ||||
| pbx.skyswitch.com | The phone system | ||||
| https://connectuc-releases.s3.us-east-1.amazonaws.com/desktop-prod/latest/ConnectUC.exe | ConnectUC desktop app download (Windows .exe) | ||||
| https://connectuc-releases.s3.us-east-1.amazonaws.com/desktop-prod/latest/ConnectUC.dmg | ConnectUC desktop app download (Mac .dmg) | ||||
| https://connectuc-releases.s3.us-east-1.amazonaws.com/desktop-prod/latest/ConnectUC.msi | ConnectUC desktop app download (.msi installer) |
Addresses and ports
An address range and two ports to open for text messages.
| ✓ | Action | URL / Configuration | Port | IPs | Notes |
|---|---|---|---|---|---|
| please open those IPs ---> | 99.77.128.0/18 | For Geder use: 99\.77\.1.* | |||
| please open those ports ---> | 8000,8001 | Required for text messages to update live |
0 of 72 items checked
ReachUC CRM Connector
Mondago Ltd (Integrator.exe)
program certificate bypass
