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Troubleshooting

Check Point Firewalls

Troubleshooting

Packetpushers with SQLNet

Check Point Firewalls Troubleshooting

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...

Check Point Product
Gateway
Troubleshooting

Show interface speed and duplex as a list

Check Point Firewalls Troubleshooting

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...

Check Point Product
Gateway
Scripting
Troubleshooting

Threat Extraction Troubleshooting

Check Point Firewalls Troubleshooting

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...

Check Point Version
R80.10
Check Point Product
Threat Extraction
Troubleshooting

F5 Troubleshooting Links

F5 BIG-IP Links & Tools

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...

F5 Product
LTM
F5 Product
ASM
F5 Product
DNS
F5 Product
APM
Troubleshooting
Links

F5 APM: Convert attribute values

F5 BIG-IP Troubleshooting

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...

F5 Product
APM
Troubleshooting

Wrong DNS Server used by random clients

Fortigate Firewalls Troubleshooting

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 ...

OS
Windows
Fortinet Product
FortiGate
Troubleshooting

Send Logfiles to F5 Support and compress them

F5 BIG-IP Troubleshooting

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...

F5 Product
BIG-IP
Troubleshooting

VPN Troubleshooting

Check Point Firewalls Troubleshooting

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...

Check Point Product
VPN
Troubleshooting

Wireshark Sample Captures

Networking Links & Tools

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...

Troubleshooting

Useful Network Diagnostic CLI commands

Networking Links & Tools

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 ...

Troubleshooting