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Questions tagged [ipsec]

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IPsec (Internet Protocol Security) is a protocol for securing IP communications by authenticating and encrypting each IP packet of a communication session.

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I am trying to establish an IPSEC transport mode connection between a Windows Server 2022 host and a SLES15 server in order to secure access to ports 22 and 3389. The connection is secured by ...
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So i have centos 7.9 with strongswan and xl2tpd installed. I can only connect with success when i setup client with a l2tp connection without ipsec psk - just unencrypted l2tp. Other connections - ...
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I have a PFsense firewall that is rejecting authentication on a peer to peer IPsec. Why? Very hard to tell if you don't know where to look. parsed IKE_AUTH response 1 [ N(AUTH_FAILED) ] is all I have. ...
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I have a site-to-site VPN created and connected, I have a local network gateway configured with my datacentre public IP along with the require local subnets at that datacentre listed. All public ...
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I am trying to connect an iPhone (iOS 16/17) to a MikroTik RouterOS 7.8 using IKEv2 + IPsec and it consistently fails. The same configuration does work with a Debian 13 client using strongSwan. The ...
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1 answer
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I cannot access my Cisco Catalyst 3560 web interface from outside LAN (via ipsec VPN), even though I'm sourcenatted as the LAN IP. I can ping it and telnet to it, but http won't go. Port 80 is opened ...
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We have a problem with the network configuration on a server running both IPsec and Docker. The server is a Ubuntu 24.04 and we are using strongSwan for IPsec. The server itself has a public IP ...
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1 answer
364 views

We need to limit RDP connections to a specific laptop. This means users are allowed to logon using RDP only from a specific laptop and not fron any other computers. We checked Windows Firewall, but ...
1 vote
1 answer
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I am building a setup so that I can connect to my home LAN from anywhere. It looks like this: Mobile device (roadwarrior) <- IPSec -> VPN server <- IPSec -> Home router I have successfully ...
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1 answer
225 views

I have three local networks at different locations: Network A with IP range 192.168.20.0 Network B with IP range 192.168.10.0 Network C with IP range 192.168.178.0 Eventually, I want to be able to ...
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I'm trying to set up an IPsec VPN from my Ubuntu server to a remote VPN endpoint. The connection seems to initiate correctly, but I only see outgoing ESP packets and no incoming responses. From ...
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1 answer
468 views

I am setting up a Strongswan server in Linux Ubuntu 24.04. I have a certificate from LetsEncrypt, which generated an ECP-256 private key. The problem is that when I try to connect to the charon ...
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I'm setting up a site-to-site IPsec VPN (IKEv2) between two networks: Network A: 192.168.1.0/24 (behind a DrayTek router) Network B: 10.1.24.0/24 (behind a pfSense firewall) The tunnel is ...
1 vote
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Since upgrading to 5.9.14 (previous i think was 5.9.10) i get an error like the following: can't install route for 192.168.0.10/32 == 192.168.0.20/32 out, conflics with IKE traffic. insatlled trap ...
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I have an IPtables matching as -m policy --dir out --pol ipsec --mode tunnel --tunnel-src 1.1.1.2 --tunnel-dst 1.1.1.1. I know that this matching works with nftables in compatible mode as xt "...

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