> Source: [sk110015](https://support.checkpoint.com/results/sk/sk110015)

# sk110015 - SmartView Tracker logs show that Active member drops PIM packets from Standby member due to address spoofing

| Property | Value |
|----------|-------|
| Solution ID | sk110015 |
| Date Created | 2016-02-08 |
| Last Modified | 2018-04-17 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * SmartView Tracker logs show that Active member drops PIM packets from Standby member due to address spoofing.

* Kernel debug ('`fw ctl debug -m fw + drop`') on Active cluster shows that PIM Hello packets sent from Standby cluster member are dropped:

  * `;fw_log_drop_conn: Packet <dir 1, `*IP_of_Standby_Member*`:0 -> 224.0.0.13:0 IPP 2>, dropped by check_spoofing_befo, Reason: Address spoofing;`
  * `;fw_log_drop_ex: Packet proto=103 `*IP_of_Standby_Member*`:0 -> 224.0.0.13:0 dropped by fw_cluster_ttl_anti_spoofing Reason: ttl check drop`
* Setting the TTL to 255 on Active member per ([sk42652](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk42652)) does not resolve the issue:  

  `# echo 255 > /proc/sys/net/ipv4/ip_default_ttl`

* Disabling Extended Cluster Anti-Spoofing (per [sk42652](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk42652)) resolves the issue.

## Cause

By design, Active member ignores PIM packets sent by Standby member. Therefore, it drops them either with "*Address spoofing* " log, or with "*Rejecting dynamic routing packet forwarded to wrong member*" log.

## Solution

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