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If you need to apply an ALG (Application level gateway) on SQLNet be careful and check the following: SQL*Net (a.k.a Oracle TNS) and firewalls… Most vendor’s firewalls have a SQL ALG that handles SQL*Net traffic.They listen on TCP port 1521. SQL*Net is base...

If you need a list of interfaces and the actual speed and duplex settings use this: # ifconfig -a | grep encap | awk '{print $1}' | grep -v lo | grep -v bond | grep -v ":" \ | grep -v ^lo | xargs -I % sh -c 'ethtool %; ethtool -i %' | grep '^driver\|Speed\|D...

Introduction The following is a collection of troubleshooting I need to do with Check Point Threat Extraction R80.10.I used the Technical Reference Guide (ATRG) here: sk114807 Workflow in MTA mode A PostFix server receives and handles the emails.  Emails...

BigIP Generic K13845: Overview of supported BIG-IP upgrade paths and an upgrade planning reference K13946: Troubleshooting ConfigSync and device service clustering issues (11.x - 13.x) K82540512: Overview of the UCS archive 'platform-migrate' option K950...

Status The problem with APM LDAP auth is that LDAP-attributes with values of ASCII chars can be used in further scripts without problems.If you have some UTF8 characters in the value the F5 APM will convert the string to a HEX-string: Aus dem F5 Manual: http...

Problem Fortigate VPN users reporting that they cannot connect to internal resources anymore.When you check the client the internal host is reachable by IP but it appears that windows isn't using the internal DNS server to resolve the host name. A check with ...

If you need to send all logfiles to F5 Support you need tom compress them all. You can do this like this as root user: Log in to the command line. Create a tar archive in the /var/tmp directory that contains all the files in the /var/log directory, by typ...

VPN Problems Links & Infos IKEv2 Internet Key Exchange Protocol Version 2 (IKEv2)https://tools.ietf.org/html/rfc5996 Check Point Probleme mit IKEv2 Site to Site using IKEv2 fails with "None of the traffic selectors match the conection"https://support.chec...

If you need to see how different protocols behave on the network here are some sample captures from Wireshark https://wiki.wireshark.org/SampleCaptures https://packetlife.net/captures/ https://www.netresec.com/?page=PcapFiles https://tshark.dev/search/pc...

Useful CLI commands to do network diagnostics with tcpdump / tshark etc. tcpdump Command Description tcpdump -nni <network-interface> icmp show icmp packets tcpdump -nni <network-interface> "icmp[0] == 0" ICMP type 0 echo reply ...