> Source: [sk115635](https://support.checkpoint.com/results/sk/sk115635)

# sk115635 - "Attack Information: Can't connect to the server" log is seen in IPS

| Property | Value |
|----------|-------|
| Solution ID | sk115635 |
| Date Created | 2017-01-23 |
| Last Modified | 2017-02-27 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Connection between 2 hosts cannot be established and IPS produces the log "Attack Information: Can't connect to the server".
* Security Gateway is configured to run in Proxy mode.
* Traffic capture confirms that SYN packet is sent, however there is no SYN-ACK response seen.

## Cause

A connectivity issue between the Security Gateway and the server results in the SYN-ACK packet not arriving to the Security Gateway.

## Solution

This solution requires authentication. Please log in to view the full solution.

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content