• How to clear DNS cache ?

    Ramesh B
    Ramesh B
    We are using XG230 firewall with latest firmware. We are web development company, we frequently update pages and DNS for our clients. But these changes not update for the users under firewall proxy rules. At same time, it is working fine with users without…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • DNS / Name Resolution Timeouts on Clients

    Greg Grotsky
    Greg Grotsky
    I have a home network and I'm using the Sopohs XG Firewall to try to secure my home network. It works very well, but I've noticed something fairly annoying for the past several months. When I navigate to a web page after turning on my PC, it takes a while…
    • Answered
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • XG DNS best practices with AD/DNS environment

    VikenNajarian
    VikenNajarian
    Hello, I have read some KB and threads about DNS best practices for XG in an AD/DNS environment but they don't say all the same things... In the most of the environment I manage for my custommers, there are AD/DNS servers and XG, actually the XG don…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • 2 ISP WAN and DNS configure

    sindbad
    sindbad
    Hi all, I configured a second WAN today. It looks good. Now I have two ISP’s. If WAN1 goes down. WAN2 will take over. Thats what I wanted. Now I do have an external domain registrar. For example hostgator.com. I have my external IP of my WAN1 in…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • How to fix an Internet Lost Connection

    Miguel Cruz
    Miguel Cruz
    Hi, good day to everybody. I need some help to fix this problem: i have a router that bring internet and network service to my sophos firewall xg, this firewall has DHCP relay to the main router. The router has bandwidht manager and load balancing…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • XG Blocking DNS Lookup - DNS Request Timeout Error

    Leebtish
    Leebtish
    Hi all, I recently tried to point our DNS servers to our XG230 but when I run an nslookup I'm receiving the error "dns request timed out. timeout was 2 seconds". Our setup is pretty simple. We have 2 x Windows 2012 DNS servers. Each server points…
    • Answered
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • DNS - Problem accessing any link

    Tiago Toledo
    Tiago Toledo
    Problem accessing any link. When accessing the link appears DNS error message, when pressing F5 the page is updated and loads the site. Has anyone had this problem? Any idea what might be causing it? Images...
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • How to refresh DNS on XG Firewall?

    Miguel Cruz
    Miguel Cruz
    HI, good day. If i change the WAN Link, with another ISP, is there a way to refresh the dns? for example in Windows i could do something like ipconfig /flushdns or even renew the IP, but, in this Firewall, how could i do this without restart the device…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • Problem with DNS when external Load Balanced change the WAN (ISP) service.

    Miguel Cruz
    Miguel Cruz
    HI, Good Day. I have a TL-ER5120 v2.0 (firmware 1.0.8 Build 20140212 Rel.36037) that gives DHCP and Internet to my Sophos XG Firewall (SFVH - C010018P2GDHJ37, firmware SFOS 17.0.3 MR-3), Im attaching some pictures. With my main router (the Tp-Link…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • Internal Domain Resolutions using SSL VPN from non-domain devices

    Andrew Cioppa
    Andrew Cioppa
    Hi, I am a new person to the Sophos XG environment, but I am having a perplexing issue that I can't figure out for the life of me. When non domain devices are connecting via the SSL VPN, they are unable to resolve any server by DNS name. When…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • A few suggestions

    MrMuishond
    MrMuishond
    After a couple of years using XG I have a few suggestions. Sorry about the formatting apparently CR’s don’t work for me. 1) sign your ISO’s and other files with gpg. Seriously. Now. You’re a security company giving people unverifiable downloads (or occasionally…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • Hidden rules and data leaking in XG

    MrMuishond
    MrMuishond
    On the subject of the XG firewall ‘leaking’, it’s worth mentioning DNS. XG doesn’t seem too bothered about DNS, can someone confirm if I’m correct with this scenario? If you have DNS turned on for a zone, you’re essentially allowing unmonitored 2 way…
    • over 6 years ago
    • Sophos Firewall
    • Discussions
  • VPN IPSec Tunnel between Fortigate and Sophos XG with DDNS

    Doudou Sine
    Doudou Sine
    Hello everyone, I need help for a Projet I am working on: We need to setup a VPN Tunnel between 2 sites, let's say HQ and Branch. HQ has a Fortigate 80D with a Static IP, Branch has a Sophos XG (Cyberoam Cr25iNG upgrade) with dynamic IP. I have…
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • How to setup VPN DNS to resolve in independent LANs?

    Dean Hammond
    Dean Hammond
    I have two deliberately independent LANs each with their own address space, DHCP and DNS servers. It all works, each LAN can contact the WAN but not the other LAN. SSL VPN is set up so that Users are assigned to one of two Groups: LAN-A or LAN-B, and…
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • XG DNS suggestions needed!

    RobinAshton
    RobinAshton
    With our XG we periodically get ATP reports that our DC/DNS servers are part of a botnet (C2/Generic)... Now it seems obvious that this is perhaps not strictly the case and that other devices on the network are making DNS lookups to known bad places through…
    • Answered
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • Flush DNS Cache on XG Firewall

    Micha Schweizer
    Micha Schweizer
    Dear all, is there an easy way to flush the DNS cache on a XG Firewall? Thanks in advance! Best Regards Micha
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • Firewall Regeln greifen nicht richtig

    Nicolaas Burleigh
    Nicolaas Burleigh
    Hallo, ich habe aktuell ein Windows Server als Internen DNS der die Anfragen an einen externen DNS (z.B. Google 8.8.8.8) weiterleitet. Bis gestern Abend hat das auch alles perfekt funktioniert. Aber seit dieser Nacht werden alle anfragen die der Interne…
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • DNS best practices with AD in Azure

    Geoff Granger
    Geoff Granger
    Looking for a little help on improving DNS queries for external web addresses. Current setup: - VPN tunnel to AD server in Azure (This has been semi stable) - DHCP coming from Sophos XG - Primary DNS is set to AD - Second DNS set to XG - XG…
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • New Setup XG 16.5 - Local DNS/Name Resolution Not Working

    Julius Perkins
    Julius Perkins
    I'm very new to the Sophos ecosystem, took the plunge two weeks ago & setup XG Firewall 16.5 in a virtual environment but need some help filling the gaps. At the moment, I have a very basic setup with the device LAN port connected to a switch that everything…
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • dnsmasq vulnerabilities (CVE-2017-14491)

    MichaelGombos
    MichaelGombos
    A vulnerability was recently released that targets dnsmasq. Our auto updating ubuntu servers all patched themselves. Is our XG firewall vulnerable to this exploit? If so, is there an ETA on a firmware update? Thanks.
    • Answered
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • Cant resolve site from internal LAN.

    John Henry Vindas Carballo
    John Henry Vindas Carballo
    Hi all, I have a XG210 in gateway mode. Also I have a server with a site (100.100.100.4) in it and an internal DNS server (100.100.100.2) to publish the site. I can see the site from the internet but not from the internal LAN. I have a DNAT rule…
    • Answered
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • Traffic from LAN not redirected to WAN

    Kurosh Dabbagh
    Kurosh Dabbagh
    Hi everybody, I just instaled a sophos xg 115 firewall and i cannot Access to internet. I connected firewall's port 2 (WAN) with ip 192.168.1.2/24 to my Movistar Router (ip 192.168.1.1/24), and then i created a LAN in port 4 with ip 192.168.75…
    • Answered
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • XG105w http error 502 bad gateway from vlan to vlan

    Viken Najarian
    Viken Najarian
    Hello, I got a weird issue with my XG105w: I have set up several VLans as follows: Vlan1: 192.168.16.0/24 Vlan10: 192.168.10.0/24 Vlan20: 172.16.16.0/24 Vlan30: 10.16.16.0 / 24 Vlan40: 10.0.0.0/24 My local servers (domain controller active…
    • Answered
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • XG DNS resolution error

    Stefan Höhnemann
    Stefan Höhnemann
    Hi, i have a problem with DNS resolution on my XG 115, but i think it's a setting mistake. VLAN 1: Client1 - IP 192.168.10.10 DNS: 192.168.10.1 VLAN 2: Client2 - IP 192.168.20.10 DNS: 192.168.20.10 FW Rule: ICMP, DNS, RDP allowed…
    • over 7 years ago
    • Sophos Firewall
    • Discussions
  • clients on LAN cannot resolve local DNS names

    kspades
    kspades
    Hello all, Im new here and I've been giving Sophos a try to replace my Sonicwall but Im having a very warm time. I have my XG setup in gateway mode, my LAN is 10.0.168.1 and is acting as my DHCP and DNS server. I have a number of clients 68.2, 68.3…
    • Answered
    • over 7 years ago
    • Sophos Firewall
    • Discussions
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