100% agree. Even i need to use vpn to connect to zscaler service since their routing so bad

Anyway at the time i writing this, their pppoe is not responding and i unable to connect to internet

Oh that actually makes me feels good.

When I ported to TM earlier this year just to save rm10 monthly it was full of regret.

did you report to celcom for routing issue for further action ?

ahhh, didnt know you using TM now. in the past i think you are the first user using celcom fiber

Yes, with mcmc ticket as well. but since its only affected my work related zscaler, so they mcm, cannot do anything any closed my ticket. only mcmc ticket still open. Already provide proof like from other isp no issue, using vpn no issue, still mcm x layan

last i just use vpn on top of zscaler, and much better ( although it add another hop)

other things is the speedtest to celcom ( since I use celcomfiber, last @pppoe) only celcom petaling manage to get 300mb down 50 up speed, other celcom server like snail. sometimes 100,sometimes 200

Btw i riding on Allo network

Whether your CelcomDigi Fibre is using TM infra or Allo infra shouldn't matter because it all comes down to CelcomDigi international routing.

I'm using Allo Fibre and have no issue using Zscaler on my work laptop(Only change I made to my network is to only allow Zscaler connection to their Singapore node)

Just curious which node did your Zscaler connect to without using VPN? Singapore node?

This post has been edited by faizyunus: Dec 12 2024, 12:29 PM

Singapore node SIN4 server. Yes its celcom network itself is bad at routing. I did pinjam my neighbour wifi for testing for allo and its work flawlessly.
To summary for zscaler ;
CD telco using celcom : bad
CD telco using digi : good
hotlink telco : good
Allo : good
Maxis fiber : good
TM: good

I previously ask them to check if they have issue with zscaler IP network ( i give them IP range). within 2 week its fine. But few week ago, I connected to SIN4 node (previous is SIN1 if I can recall) then back to issue again. Asked again to check , now they rejected

I see. Oh well, if telco refuse to help then there is nothing much you can do.

I assume your traceroute going to Zscaler is ok. The issue probably lies with routing from Zscaler SIN4 node to Celcom network where Celcom is responsible for that routing.

The trickiest part is determining which upstream are they using for routing from Zscaler SIN4 node to Celcom network

Celcom Upstream:



Digi Upstream:

aha, really like your explanation

this is the tracert from my home to sin4 server ( tracert without zscaler turn on)



edited : hmmm since like they fixed the routing. previously the ping to last hop is around 200+. lemme check again

ping during last november


Last time, my ping to zscaler is bad. now its mcm dah okay pulak haha

This post has been edited by iXora.ix: Dec 12 2024, 08:05 PM

anybody here still on celcom?

i dunno if my area sucks, i'm connected to pppoe but i cant open local or international website (on and off for about a week already)

need to VPN to surf

same. happen around morning. Some website mcm loading. whatsapp also cannot access, need to use data.
celcom messup the routing again?

after using vpn, indeed able to surf internet as usual. only lowyat can open with no issue without internet

This post has been edited by iXora.ix: Aug 18 2025, 09:36 AM

yeah, i need to set up a temporary vpn router. both celcom fibre and mobile cannot connect to anything.

seem like widespread. I currently open ticket with them, but even their respond also slow than usual in whatsapp hjaha

I think it is ok already.
My factory cctv since this morning can’t access and website loading on and off can’t load(even lowyat.net).
But now I can access the cctv of my factory and website loading seems back to usual already..

This post has been edited by LizStephenie: Aug 18 2025, 09:54 AM

seems like yes. I checked on bgp update for as10030 celcom, seems like there is hige spike on pas few hours but now it start to return normal

how’s using celcom fibre so far? im planning to change to celcom fibre

ermm. IMO, better stick to another ISP. unless your postpaid is already high end tier then you can take CD fiber with CD one plan, which better value. If fiber only, stick with other ISP.
Why? because when there is issue, your contact method is only whatsapp and call which no dedicated support for fiber( you ticket will lodge by normal CSD, and takes time to re route to network team.
CD fiber under Digi is fine, BUT CD fiber under celcom is meh. It will follow ypur master postpaid number

got offer 1Gbps for RM110 with 24 months contract. too good to pass 😂

I suppose this needs to combine with postpaid? Yes it is a good deal to go for.

Wow too good to be true. From agent or official channel?
Riding which isp?