I've been using this stuff forever, and I've only had to replace a couple. That was due to lightning strikes, power surges, and other things that are out of our control. It's a highly stable platform with very few hardware issues. As long as you set it up right. I have my solution scripted so I receive backups and nightly config files in the email. Each night, I look at the executive report to monitor the solution. As long as the administrator takes the time to set it up correctly, I think it's a highly stable product.

Initially, there were issues with the wireless network as wireless access points were disappearing from the dashboard after some time. Later issues were resolved by connecting the wireless access points through Cisco switches.

I would rate the stability as nine out of ten.

It is stable and reliable. The performance is good. There aren't bugs or glitches. It doesn't crash.

The solution is stable. I'd rate it nine out of ten in terms of reliability. There are no bugs or glitches, and it doesn't crash or freeze. 

The solution is stable. 

I rate the solution ten out of ten for stability.

It is a stable solution. Stability-wise, I rate the solution an eight out of ten.

Stability-wise, I rate this solution a ten out of ten.

This is a stable product. In my experience, I have only seen one case where, after four years, a customer's UTM was completely dead. The motherboard just died.

This customer had a license, so they contacted Sophos and within one week, they had a replacement.

Sophos UTM is a stable solution.

Its stability is very bad. It needs to be improved. The power supply issue that I faced is a very critical one.

The stability has been excellent. It doesn't crash or freeze. There are no bugs or glitches. It's very good and very reliable. 

The stability is pretty good and better than XG. We don't have any issues directly related to the solution.

Stability is rated a ten out of ten. 

It is absolutely stable. 

Sophos UTM is very stable. It's an eight for me, stability-wise, on a scale of one to ten.

Sophos UTM is a highly stable solution. It has high availability.

Very stable. Very good.

In terms of stability, it's definitely top-notch, a market leader. The ability to do things and the availability of it being online aren't an issue.

The stability of Sophos UTM is good.

I rate the stability of Sophos UTM an eight out of ten.

The product is stable and reliable. There are no bugs or glitches. It doesn't crash or freeze. 

It is redundant enough. I don't have any issues with it.

The solution is stable and reliable. There are no bugs or glitches. It doesn't crash or freeze. 

The solution is stable. 

Sophos UTM is stable.

It's been very stable. In fact, we haven't had any complaints or any issues with it. There are no bugs or glitches. It doesn't crash or freeze. The performance is great.

With the ability of the hardware, we haven't experienced any problems with Sophos UTM so far. Neither have our customers. 

At the beginning of the XG version, three years back, they had hardware issues. After that Sophos deployed division two, three, and four as hardware appliances.

Sophos fixed the hardware issue for the lower models, i.e. the 525, the XG 125, and the XG 85. All of the larger Sophos UTM models were fine.

Now, all are stable, all are fine. We haven't seen any crash. One of our customers had a DDoS attack. Since he had the proper rules, we did not record any incident. 

Sophos UTM blocked the DDoS. Although it is not a dedicated anti-DDoS solution, Sophos UTM has the features. 

Sophos UTM is stable. I haven't seen any claims or issue tickets from our customers regarding stability.

This solution is absolutely stable. 

The solution is very stable if you size the unit to the environment. An SG125 is great for a 25 person office with web, email filtering, application control, etc. but it would not work well in a 100 person office. You need to know the proper sizing prior to deployment.

The stability of Sophos UTM is very good. The solution has been stable since Sophos took over Cyberoam which was the original company providing this solution.

I have never had a stability issue with Sophos. It self-heals.

The stability of the Sophos UTM is very good, most of our clients do not have to reboot the firewalls. 

The solution is very stable. There are no bugs or glitches. It doesn't crash or freeze. It's reliable. 

Major firmware release can sometimes be buggy initially but are soon pathed and stabilized. My advice would be to sit tight for 9.x release for about a week before implementing 9.x.yyy releases often fix bug without introducing stability issues.

There are two aspects to consider: software stability and hardware stability. The software is a bit stable, but the hardware needs a lot of improvement. So the software can be rated nine out of ten, but the hardware is only seven out of ten.

I understand that it's had a couple of releases too frequently but I want to believe that it's relatively stable. 

I still believe that in terms of stability, Symantec is better, so this can be improved.

I have never come across any major stability issues. I have seen some bugs on newer firmware releases which have only affected units configured in HA. Sophos is usually quick to fix these bugs.

It is a stable product.

We don't find this to be fully stable; we have had to restart the firewall on a few occasions.

For the whole life of Sophos SG UTM, it has been highly stable.

On the newer XG version, we have had a lot of small bugs on the very first version. We were having lots of small bugs on different functions and it had been a mess for a lot of integrators to make it work and to keep confidence in the XG. The XG had a lot of functions and all functions could have a lot of bugs. Even if everything is under control on one or several functions, there were some functions that had many, such as the VPN. However, in version 18 the stability was a lot better. 

You rely on the stability of a firewall and if you have some bottlenecking from the communication from or to the internet. It is very difficult to be confident in Sophos and we lost some confidence in Sophos in the very earlier version.

Overall, we had more problems with the XG than with the SG version.

The stability and performance are good. The solution is reliable. There are no bugs or glitches. It doesn't crash or freeze. It's good.

I rate the stability of Sophos UTM a ten out of ten.

The solution's stability is excellent, and it is reliable. There are no bugs or glitches, and it doesn't crash or freeze. 

Sophos UTM is a strong solution. I give it a 10 out of 10 for stability.

The product is stable. It's a product that our clients are able to use and enjoy. We haven't had many complaints about the product at all. Internally we haven't experienced any problems. 

We haven't had an issue with it yet. 

Any given day, we have easily ten to 15 users on it constantly, plus some other ancillary services which go across the VPN to access resources in our environment.

No, we did not. Backups were done daily, and its Linux backend gave us no issues.

Sophos UTM is stable and ready for customization. 

The stability has been good. There are no bugs or glitches. It doesn't crash or freeze. It's reliable. 

It's a stable solution.

No issues with stability.

Sophos UTM is stable so far. 

The solution is stable. 

No issues encountered.

It's pretty stable. For our usage, it has been pretty good.

Sophos UTM is quite stable.

The stability of the product is quite good. We haven't had any issues with bugs or glitches. It doesn't crash or freeze on us. We trust its reliability.

We have not encountered any issues with stability.

The appliance has been very stable, only being rebooted to apply patches for security vulnerabilities, which fortunately is not very often.

At the beginning, there were stability issues, due to a poorly configured switch. I had problems with HA, but after that, there were no stability issues.

The only stability issue we have encountered was an update caused the unit to over process things. Everything kept running but it did slow down Internet access because of this.

I would rate Sophos UTM's stability eight out of ten.

Sophos UTM is stable which is why I like it.

It's stable, but the reaction time of the GUI is terrible; however, in my opinion, UTM is more stable than XG.

It is a little too CPU resource intensive, so we would like to see improvements there.

I am stressing it quite a bit, and the stability is great. I haven't performed any maintenance on the instances in quite a while now. It works. I am happy because everything works well.

No problems with stability.

There are some legacy things that were probably fine back in the day when it was invented in Germany, things like the IPS, the Intrusion Protection engine. It's terrific and it works really well, but it can be a little bit slow. Because of the way that some pieces are built, for example the core for the IPS runs on only core, even if you have a multi-core CPU. 15 years ago that wasn't a big deal because your weak link was going to be your computer. But nowadays, you could have a fast enough computer if they could just let it work with multi-cores. They clearly aren't interested in rewriting large portions of the code because they're going to the XG so all they do is fix it or maybe add a feature that's in the marketplace. Over time, they've been adding more ways to do a VPN tunnel but some things they need haven't been added because it would require a big rewrite and they don't want to go there.

No issues encountered.

Very rare cases of appliance lost admin password or web-service hangs.

If you enable the intrusion prevention option in the firewall any Wordpress deployments on a Plesk server behind the firewall slows down to a crawl, and there is no fix yet. The current workaround is disabling the intrusion prevention option at the moment.

The solution is stable and reliable. There are no bugs or glitches, and it doesn't crash or freeze. 

The stability of the product is good.

No.

Some with the IPS function (snort).

In my case, when restarting the system (because of an update), I doubt that snort starts correctly and do a manual restart of the IPS function (see my answer for 'Room for Improvement').

The solution is stable. 

Both the stability and scalability are great.

This is a very stable product.

No issues with stability.

It has been stable. We haven't had issues. It does what it is supposed to do.

UTM is stable.

It's very stable. In all the time I have been using it, I haven't seen it fail or gets stuck.

There are no more stability issues than with other vendors, so I would say it's very stable.

We encountered stability issues more on the Web Filtering feature where certain valid websites are blocked or the video cannot be played and it requires extra exceptional configuration.

We have over 30 Sophos UTMs running. There are some that are not stable, because of the bridges used or ISP used (Cisco vPCs/Dell MLAGs etc.).

I had an issue with transparent mode in a demo, but mostly it is a very stable appliance and software.

No.

The solution is stable. 

The stability is OK. 

It is stable.

It's a stable solution for 90% of the time.

There are some things that are not quite 100% and it could be improved.

Rarely.

No stability issues at all.

No.

Only thing we have noticed as of late was that their firmware updates break something else that was working in a previous version. Only noticing this on some customers though not all customers.

The stability is good.

The stability is very good.